Lancet: Study on serotonin-positive infection rates of new crown pneumonia in Geneva, Switzerland

Serum antibody testing found severe acute respiratory syndrome coronavirus 2 (anti-SARS-CoV-2) asymptomatican important method forinfected, and recently researchers assessed the changein in the prevalence of anti-SARS-CoV-2 antibodies in the Population of Geneva, Switzerland, during the outbreakSEROCoV-POP study is a population-based study in which participants and their family members 5 years and older were randomly selected in previous population representation surveys for a series of 12 consecutive weeks of serum surveysSerum prevalence was estimated by testing anti-SARS-CoV-2-IgG antibodies for each participant using ELISAbetween April 6 and May 9, 2020, the researchers recruited 2,766 participants from 1,339 households with a population similar to that of the Canton of GenevaIn the first week, the researchers estimated the seropositive rate at 4.8% (n-341)The second week is estimated at 8.5 per cent (n-469), the third week is 10.9 per cent (n-577), the fourth week is 6.6 per cent (n-604), and the fifth week is 10.8 per cent (n-775)The seropositive risk in people aged 5-9 years (relative risk (RR: 0.32) and over 65 years of age (RR: 0.50) was significantly lower than for people aged 20-49Taking into account the time of serum conversion, the researchers estimate that for every confirmed case reported, there are 11.6 infections in the communityAlthough 5,000 cases ofnew crown pneumoniawere reported in 2.5 months out of a population of 500,000 people in Geneva, Switzerland, most of the population of Geneva remained uninfected during the pandemicCompared to the 10-64 year old population, the seropositive rate of children aged 5-9 yearschildrenand over 65 years of age decreased significantly