Serological screening in a large-scale municipal survey in Cascais, Portugal, during the first waves of the COVID-19 pandemic: lessons for future pandemic preparedness efforts.

Across the 38 weeks of the study, the percentage of reactive cases per week showed an increasing trend (value of p < 2e-16), ranging from 0.4% (95% C.I.: 0.11–1.47%) in the second week to 41.9% (95% C.I.: 26.4–59.2%) in the last week ( Figure 1 ).

also in 11,222 other papers