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Topics in Antiviral Medicine ; 29(1):86-87, 2021.
Article in English | EMBASE | ID: covidwho-1250792


Background: Understanding the adaptive immune response to SARS-CoV-2, kinetics, persistence and their relationship with the disease severity would be crucial in order to predict recurrences, reinfections and could serve in the design of vaccination strategies. We sought to characterize IgG and neutralizing antibodies (NAbs) against SARS-CoV-2 in patients who were admitted to hospital with COVID-19 disease. Methods: All patients admitted between March-April 2020 with moderate, severe and critical SARS-CoV-2 pneumonia were prospectively studied. Clinical, laboratory data and IgG against SARS-CoV-2 levels were assessed at baseline (upon admission) and months 1, 3 and 6. NAbs were assessed at month 1, 3 and 6. IgG against the SARS-CoV-2 spike (S) protein was measured in serum by chemiluminescence (LIAISON® SARS-CoV-2 S1/S2, DiaSorin) and results were expressed in arbitrary units (AU)/mL. The neutralizing activity of plasma samples was analyzed in a 293T/hACE2 cell infection test using a surrogate viral inhibition assay that uses human immunodeficiency virus type 1 (HIV-1)-based virus expressing SARS-CoV-2 S protein and Luciferase. For neutralization assays, pseudoviruses were incubated with increasing plasma dilutions (range 1/60-1/14,580) in order to obtain the ID50 values. Results: A total of 110 patients who were discharged from hospital were recruited. Median (range) age was 61 (57-71);61.2% were male and most reported comorbidities were hypertension (39.6%), diabetes (24.3%) and obesity (19.8%). Median time from symptoms onset to admission was 9 days (range 7-11). Median (range) IgG levels (AU/mL) at baseline and months 1, 3 and 6 were 48 (28-81), 168 (134-210), 140 (112-171) and 146 (104-206) respectively. No significant differences were observed in median IgG fold change values up to month 6 among severity groups. Median (range) ID50 values for NAbs at months 1, 3 and 6 were 3938 (1958-6407), 4344 (2335-6752) and 424 (124-1022) respectively. NAb titers presented a significant decrease (overall-10.2-fold change from maximal values) without differences among severity groups (Figure 1 a and b). No reinfections occurred. Conclusion: Specific humoral immune response to SARS CoV-2 in patients requiring hospital admission characterizes for a clear peak between 30 and 90 days after admission followed by a significant decline in titer of NAbs by day 180 regardless of disease severity. Longer follow-up may help to determine the longevity of the specific immune response.

Topics in Antiviral Medicine ; 29(1):205-206, 2021.
Article in English | EMBASE | ID: covidwho-1250108


Background: We compared the characteristics and clinical outcomes of hospitalized patients with COVID-19 with and without HIV infection (HIV-pos and HIV-neg) in Spain during the first wave of the pandemic. Methods: HIV-pos were identified by reviewing clinical records and laboratory registries of 10,922 patients in active-follow-up within the Spanish HIV Research Network (CoRIS) up to June 30, 2020. Each HIV-pos was matched with 5 HIV-neg of the same age and sex randomly selected from COVID-19@Spain, a multicenter cohort of 4,035 patients hospitalized with PCR confirmed COVID-19 in Spain (Clin Microbiol Infect 2020;26:1525-36). Data were collected with the ISARIC-WHO Core case report form ( The COVID-19 SEIMC score (predictive of 30-day mortality), based on age, sex, dyspnea, O2 saturation, neutrophil-to-lymphocyte ratio, and estimated glomerular filtration rate, was calculated at admission in all patients (ESCMID Conference on Coronavirus Disease, 2020, Abstract#00513). Outcomes included the need for mechanical ventilation and all-cause in-hospital mortality. Results: Forty-five patients with PCR confirmed COVID-19 were identified in CoRIS, 21 of which were hospitalized. A total of 105 age/sex-matched controls were selected from COVID-19@Spain. The median age in both groups was 53 (Q1-Q3, 46-56) years, and 90.5% were men. In HIV-pos, 19.1% were IDUs, 95.2% were on ART, 94.4% had HIV-RNA < 50 copies/mL, and the median (Q1-Q3) CD4+ count was 595 (349-798) cells/mm3. No statistically significant differences were found between groups in number and type of comorbidities, presenting signs and symptoms, laboratory parameters, and radiology findings. The median (Q1-Q3) COVID-19 SEIMC score on admission was 4 (2-7) and 5 (3-7) in HIV-pos and HIV-neg, respectively;P=.890. Corticosteroids were administered to 33.3% and 27,4% HIV-pos and HIV-neg, respectively;P=.58. Remdesivir was administered to 0 and 2.9% of HIV-pos and HIV-neg, respectively;P=.426. During admission, 9.5% HIV-pos and 23.3% HIV-neg underwent mechanical ventilation;P=.158. In-hospital mortality was 9.5% in HIV-pos and 11.4% in HIV-neg;P=.800. Conclusion: Our findings suggest that well-controlled HIV infection does not modify the clinical presentation or worsen clinical outcomes in patients hospitalized with COVID-19. (Figure Presented).