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J Infect ; 83(2): 237-279, 2021 08.
Article in English | MEDLINE | ID: covidwho-1244767


Data are presented of 368/503 post-COVID-19 outpatients followed within the AntiCROWN Cohort who have a one-year control and a baseline assessment of anti-S1/S2 antibodies, detected with the The LIAISON® SARS-CoV-2 S1/S2 IgG solution by DiaSorin. Loss of response occurred in 4 subjects having a baseline level below 50 AU/mL.

COVID-19 , SARS-CoV-2 , Antibodies, Viral , Humans , Immunoglobulin G , Preliminary Data , Prospective Studies , Spike Glycoprotein, Coronavirus
J Med Virol ; 93(3): 1766-1769, 2021 03.
Article in English | MEDLINE | ID: covidwho-1196474


Asymptomatic and convalescent coronavirus disease 2019 (COVID-19) subjects may carry severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) for months in their upper respiratory ways. Desiring to permanently clean the mucosal surfaces, we investigated the chemical agents that fit to rapidly degrade the virus. Among these, hydrogen peroxide, initially tested by two of us for tolerability, showed both good performance and acceptable side effects (burning sensation for 15-20 s). We contacted circles of family physicians and the ATS Milano (Territorial Assistance and Prevention Service), and we tested this procedure on eight persistent carriers of SARS-CoV-2, performing swabs before the procedure and after it until the reappearance of the virus or until 14 days (the incubation period), keeping the surfaces clean with a hypertonic solution. Our patients had a median time from exposure or symptom onset of 111 days, and three had relapsed after being declared "cured" (two consecutive negative swabs after quarantine). One patient had a baseline negative swab and was excluded, and two successfully ended the 14 days' course, four suppressed viral elimination for 72 h, and one for 48 h, all rebounding to weak positive (cycle thresholds above 24). Although temporarily effective, such measures may have some place in the control of viral shedding to protect the most fragile subjects.

COVID-19/drug therapy , Carrier State/drug therapy , Hydrogen Peroxide/therapeutic use , Oxidants/therapeutic use , SARS-CoV-2/drug effects , Adult , Antiviral Agents/therapeutic use , Carrier State/virology , Female , Humans , Male , Middle Aged , Nasopharynx/virology , SARS-CoV-2/isolation & purification , Treatment Outcome , Virus Shedding/drug effects