HPV vaccination programs in LMIC: is it time to optimize schedules and recommendations?

Abstract Objectives: Prophylactic HPV vaccines are a fundamental tool to reduce infections and tumors caused by the most prevalent types of these viruses, as this review points out. Several countries have adopted immunization programs that recommend vaccination against HPV for girls and adolescents between 9 and 14 years of age and, in some of them, also for boys. The programs also contemplate the immunization of adults, particularly in the case of individuals with different immunodeficiencies. Sources of data: The available vaccines are recommended for the prevention of tumors of the uterine cervix, vulva, vagina, penis, and anal canal. Moreover, two of the vaccines prevent the occurrence of genital warts, having been recently indicated for the prevention of oropharyngeal cancer. Data synthesis: Based on the evidence that antibody responses in girls were non-inferior after two doses when compared to three doses, several countries have decided to reduce the vaccination schedule for girls and boys up to 14 years of age from three to two doses, with an interval of six months between them. Recently, knowledge has been accumulating about the immunogenicity, duration of protection, and efficacy of a single-dose HPV vaccine regimen in girls and young women. Conclusion: Single-dose HPV vaccination could substantially reduce the incidence of pre-cancer and cervical cancer attributable to HPV, with reduced costs for vaccine delivery and simplified implementation, allowing more countries to introduce HPV vaccination or increase the adherence of the target population.

Comparison of humoral immune response in heterologous and homologous COVID-19 booster vaccine groups using CoronaVac and mRNA-based BNT162b2 vaccines

ABSTRACT Background: Heterologous COVID-19 booster vaccination is an alternative strategy to homologous vaccination, especially in developing countries, due to shortages, delays, or unequal distribution of COVID-19 vaccines. We compared cohorts vaccinated with different vaccine combinations to investigate whether a heterologous booster dose of mRNA-based BNT162b2 vaccine boosts the immune response in individuals primed with the CoronaVac vaccine. Methods: Anti-RBD IgG is generally measured 4 weeks after primary immunization and 4 weeks after booster vaccination. Data on anti-receptor-binding domain (anti-RBD) IgG antibody titers and clinical characteristics were provided by infection control units. Results: The highest median anti-RBD IgG antibody titers (14589 AU/mL) after primary immunization was observed in the group vaccinated with two doses of BNT162b2 vaccine. Antibody titers were lower 4 months or more after the second CoronaVac vaccine dose in CoronaVac recipients with or without previous COVID-19. In the homologous COVID-19 booster vaccine group (primed with two doses of CoronaVac 4 weeks apart and a single booster dose of CoronaVac) the median anti-RBD titers decreased from 1025 to 242 AU/mL before the booster dose. In the heterologous group (primed with two doses of CoronaVac 4 weeks apart and a single booster dose of BNT162b2), the median anti-RBD titer increased to 31624 AU/mL, a 132-fold increase, 16 days after the booster dose. Conclusions: After the second dose of CoronaVac, protective neutralizing antibody levels decrease over time, and a booster dose is required. Heterologous COVID-19 booster vaccination with BNT162b2 is effective at boosting neutralizing antibody levels.

No cumplimiento del esquema de vacunación nacional en niños menores de 5 años en la selva peruana en el año 2019

Introducción: Se ha visto un decaimiento de la cobertura de vacunas en niños residentes de Perú, menores de cinco años; siendo la región selva la más afectada. Objetivo: Analizar los factores sociales y maternos asociados al no cumplimiento del esquema nacional de vacunación en menores de cinco años en la selva peruana, año 2019. Métodos: Estudio observacional, analítico y retrospectivo. Se utilizó la base de la Encuesta Demográca y de Salud Familiar (ENDES) Perú, 2019. Se seleccionaron las variables de estudio y se utilizó el programa SPSS 26,0 para el análisis. De 4 373 encuestas seleccionadas se evidenció que el 57,5% de niños menores de cinco años de la selva peruana no cumplieron con el esquema nacional de vacunación (ENV); los factores asociados fueron pobreza (RPa=1,18, p<0,001, IC95% 1,08-1,29), lengua materna nativa (RPa=1,17, p<0,001. IC95% 1,07-1,30), problemas para acudir al centro de salud (RPa=1,09, p=0,036, IC95% 1,04-1,21), edad menor a 24 años de madre/apoderado (RPa=0,78, p<0,001, IC95% 0,68-0,89) y no tener seguro de salud (RPa 1,2; p<0,000, IC95% 1,11-1,29). Conclusión: Los factores de riesgo sociales, pobreza (RPa=1,18, p<0,001, IC95% 1,08-1,29) y lengua materna nativa (RPa=1,17, p<0,001. IC95% 1,07-1,30); y los factores de riesgo maternos, problemas para acudir al centro de salud (RPa=1,09, p=0,036, IC95% 1,04-1,21), edad menor a 24 años de madre/apoderado (RPa=0,78, p<0,001, IC95% 0,68-0,89) y no tener seguro de salud (RPa 1,2; p<0,000, IC95% 1,11-1,29), se asociaron a no cumplimiento del ENV.

Introduction: A decline in vaccine coverage has been seen in children living in Peru, under ve years of age; being the jungle region the most affected. Objective: Analyze the social and maternal factors associated with non-compliance with the national vaccination scheme in children under ve years of age in the Peruvian jungle, year 2019. Methods: Observational, analytical and retrospective study. The base of the Demographic and Family Health Survey (ENDES) Peru, 2019 was used. The study variables were selected and the SPSS 26.0 program was used for the analysis. From 4,373 selected surveys, it was shown that 57.5% of children under ve years of age in the Peruvian jungle had non-compliance with the national vaccination scheme (ENV); the associated factors were not having health insurance (RPa 1.2; p<0.000, CI95% 1.11-1.29), poverty (RPa=1.18, p<0.001, CI95% 1.08-1, 29), native mother tongue (RPa=1.17, p<0.001. CI95% 1.07-1.30), problems going to the health center (RPa=1.09, p=0.036, CI95% 1, 04-1.21), and mother/guardian age under 24 years (RPa=0.78, p<0.001, 95% CI 0.68-0.89). Conclusion: The risk factors associated with non-compliance with the ENV were: social, not having health insurance (RPa 1.2; p<0.000, CI95% 1.11-1.29), poverty (RPa=1.18, p< 0.001, 95% CI 1.08-1.29) and native mother tongue (RPa=1.17, p<0.001. 95% CI 1.07-1.30); and maternal, problems going to the health center (RPa=1.09, p=0.036, 95% CI 1.04-1.21), and mother/guardian age under 24 years (RPa=0.78, p <0.001, 95% CI 0.68-0.89).

Estudio piloto de los factores que intervienen en el cumplimiento del calendario de vacunación en las madres con niños menores de 5 años / Pilot study of the factors involved in compliance with the vaccination schedule in mothers with children under 5 years of age

Diferentes características socio demográficas describen una disminución en el proceso de vacunación en niños originando rebrotes de enfermedades que se suponían controladas. Objetivos, comprobar la confiabilidad del instrumento de investigación para medir los factores que intervienen en el cumplimiento del calendario de vacunación en las madres con niños menores de 5 años. Materiales y métodos: esta investigación se empleo la metodología mixta, de corte transversal, exploratoria, descriptiva, en la cualitativa se usó la técnica fenomenológica con instrumentos diseñados por los investigadores y validado por juicio de expertos, Resultados. El instrumento de recolección de datos es validado con un puntaje promedio de pertinencia 89, validez de 90 y coherencia 89. Equivalente a 89.33 de confiabilidad, alfa de Cronbach de 0,07, Conclusiones. El instrumento al ser confiable está en condiciones de ser utilizado en investigaciones subsiguientes, teniendo en cuenta que la población a la que se aplicó reúne condiciones específicas de una área rural, dentro de los factores que modifican el cumplimiento del proceso de vacunación se recalcó las creencias de las madres del sector, quienes manifiestan un estado de inseguridad e incertidumbre al oponerse a la aplicación de vacunas a sus hijos, se detalla el estado emocional con tendencia a la depresión con rasgos de ansiedad de las madres como resultado de la actitud de su cultura de desconfianza(AU)

Different sociodemographic characteristics describe a decrease in the vaccination process in children, causing outbreaks of diseases that were supposed to be controlled. Objectives, to verify the reliability of the research instrument to measure the factors that intervene in the fulfillment of the vaccination schedule in mothers with children under 5 years of age. Materials and methods: this research used the mixed, cross-sectional, exploratory, descriptive methodology, in the qualitative one the phenomenological technique was used with instruments designed by the researchers and validated by expert judgment, Results. The data collection instrument is validated with an average relevance score of 89, validity of 90 and coherence of 89. Equivalent to 89.33 reliability, Cronbach's alpha of 0.07, Conclusions. The instrument, being reliable, is able to be used in subsequent investigations, taking into account that the population to which it was applied meets specific conditions of a rural area, within the factors that modify compliance with the vaccination process, beliefs of the mothers of the sector, who manifest a state of insecurity and uncertainty when opposing the application of vaccines to their children, the emotional state with a tendency to depression with anxiety traits of the mothers as a result of the attitude of their culture is detailed. of mistrust(AU)

Consenso de inmunizaciones del adulto 2020-2021

La inmunización es el proceso por el que una persona se hace inmune o resistente a una enfermedad infecciosa, por lo general mediante la administración de una vacuna. Las vacunas estimulan el propio sistema inmunitario del cuerpo para proteger a la persona contra infecciones o enfermedades posteriores. La inmunización previene enfermedades, discapacidades y defunciones por enfermedades prevenibles por vacunación, tales como el cáncer cervical, la difteria, la hepatitis B, el sarampión, la parotiditis, la tos ferina, la neumonía, la poliomielitis, las enfermedades diarreicas por rotavirus, la rubéola y el tétanos. La prevención y el control de las enfermedades prevenibles por vacunación (EPVs) es una prioridad de los sistemas de salud de Latinoamerica. Este Consenso ha sido actualizado por profesionales con experiencia en la Vacunación, pertenecientes a la Sociedad Venezolana de Infectología, la Sociedad Venezolana de Puericultura y Pediatría y la Sociedad Venezolana de Salud Pública. El esquema de Vacunas del Adulto aplica a personas desde los 18 años de edad. Se considera esquema completo, cuando se han administrado todas las dosis y/o sus respectivos refuerzos, de acuerdo a su edad correspondiente y riesgos Se presentan los esquemas en forma de calendarios, de manera que los profesionales del sector salud y afines, como la población en general puedan utilizarlos de manera práctica, como esquema de bolsillo para su consulta rápida, como Calendario Vacunal de Adultos 2020 - 2021

Immunization is the process by which a person becomes immune or resistant to an infectious disease, usually through the administration of a vaccine. Vaccines stimulate the body's own immune system to protect the person against subsequent infections or illnesses. Immunization prevents diseases, disabilities, and deaths from vaccine-preventable diseases such as cervical cancer, diphtheria, hepatitis B, measles, mumps, pertussis, pneumonia, polio, rotavirus diarrheal diseases, rubella and tetanus. The prevention and control of vaccine-preventable diseases (VPDs) is a priority of the Latin American health systems. This Consensus has been updated by professionals with experience in Vaccination, belonging to the Venezuelan Society of Infectology, the Venezuelan Society of Childcare and Pediatrics and the Venezuelan Society of Public Health. The Adult Vaccines scheme applies to people from 18 years of age. A complete scheme is considered when all the doses and / or their respective boosters have been administered, according to their corresponding age and risks. The schemes are presented in the form of calendars, so that professionals in the health sector and the like, as well as the general population, can use them in a practical way, as a pocket scheme for quick consultation, such as the Adult Vaccine Calendar 2020 - 2021

Factores que influyen en el ausentismo de vacunación en niños de 2 a 5 años del centro de salud 22 de noviembre milagro 2019 / Factors that influence vaccination absenteeism in children from 2 to 5 years old from the centro de salud 22 de noviembre milagro 2019

Los factores que influyen en el ausentismo del esquema de vacunación en niños de 2 a 5 años del centro de salud "22 de noviembre de la ciudad Milagro", se dan por diferentes causas, pero las más relevantes se centran en la falta de información por parte de los padres de familia, en cuanto a los beneficios de la vacunación. Objetivo: Determinar los factores que influyen en el ausentismo del esquema de vacunación en niños de 2 a 5 años del Centro de Salud 22 de noviembre de Milagro 2019. Metodología: La investigación se inserta dentro del paradigma positivista bajo el enfoque cuantitativo. La modalidad de investigación fue de campo no experimental. La población de este estudio se constituyó por los `padres de los niños de 2 a 5 años del Centro de Salud 22 de noviembre de Milagro. La muestra de tipo probabilístico fue de 30 padres que asistieron en las últimas tres semanas al centro de salud. Su selección se hizo de forma aleatoria estratificada o muestreo aleatorio proporcional, a través de la técnica de muestreo probabilístico. Los datos se recogieron mediante una encuesta y como instrumento el cuestionario que abarcó un banco de preguntas. Conclusión: se pudo concluir que en su mayoría conocen la importancia de las vacunas, pero se recomienda que los centros de salud den seguimiento a los niños con esquema de vacunación incompleto para evitar rebrotes de patologías a futuro y, además, acompañarla de información oportuna(AU)

The factors that influence the absenteeism of the vaccination scheme in children from 2 to 5 years of age at the "22 de Noviembre de la Ciudad Milagro" health center are due to different causes, but the most relevant are centered on the lack of information from parents, regarding the benefits of vaccination. Objective: To determine the factors that influence the absenteeism of the vaccination scheme in children from 2 to 5 years of the Health Center November 22, Milagro 2019. Methodology: The research is inserted within the positivist paradigm under the quantitative approach. The research modality was non-experimental field. Parents of children aged 2 to 5 years from the Centro de Salud 22 de Noviembre, Milagro, constituted the population of this study. The probabilistic sample consisted of 30 parents who attended the health center in the last three weeks. Their selection was made in a stratified random or proportional random sampling, through the probabilistic sampling technique. The data were collected through a survey and as an instrument the questionnaire that included a bank of questions. Conclusion: it was possible to conclude that most of them know the importance of vaccines, but it is recommended that health centers follow up children with incomplete vaccination schedule to avoid future outbreaks of pathologies and, in addition, accompany it with timely information(AU)

Case Profile, Volume Analysis, and Dropout Rate of Antirabies Vaccination Regimens among Animal Bite Victims in Gujarat.

Background: Rabies is a preventable neglected public health problem and associated with multiple cultural, religious, and social practices, myths in our country. There is a lack of organized surveillance system to measure the incidence of animal bite and human rabies as well as to evaluate cost‑saving of different routes, regimen, and types of antirabies vaccines (ARV)/immunoglobulin available in India. Objectives: The objective of this study is to know dropout rate in intradermal (i.d.) ARV regimen among animal bite and to analyze the utilized volume of ARV by a different route of vaccine administration. Methods: A total of 250 animal bite victims were followed up at ARV Clinic (ARVC). Volume utilization of i.d. route over intramuscular (i.m.) route was analyzed among the patients who attended ARVC during the past 2 years. Total dropout and delayed compliance rates of ARV regimen among different group were compared by Chi‑square test. Results: The i.d. route was about five times more volume and cost‑saving than i.m. route. The majority of victims belonged to 15–30 years (27.60%) and children <15 years (26.40%) and had wound at their lower limbs (85%) mainly bitten by dogs (98%). Thirty‑four percent total dropout and 31.5% delayed compliance observed particularly during the last dose of i.d. regimen. There was no significant difference in dropout rates among different demographic groups. Half of the victims practiced wound toilet on the same day of bite. Only 68% received the first dose of ARV within 24 h of the exposure. Conclusion: Children and young adults are at higher risk of having dog bite. I.d. ARV regimen is more volume and cost‑saving than i.m. one and proper counseling and follow‑up should be arranged to complete the vaccination schedule.