In conclusion, closure or not of schools has had little if any impact on the number of laboratory confirmed cases in school aged children in Finland and Sweden. The negative effects of closing schools must be weighed against the positive effects, if any, it might have on the mitigation of the covid-19 pandemic.
Six of 12 men wintering at an isolated Antarctic base sequentially developed symptoms and signs of a common cold after 17 weeks of complete isolation. Examination of specimens taken from the men in relation to the outbreak has not revealed a causative agent.
SARS-CoV-2 was detected in Barcelona sewage long before the declaration of the first COVID-19 case, indicating that the infection was present in the population before the first imported case was reported. Sentinel surveillance of SARS-CoV-2 in wastewater would enable adoption of immediate measures in the event of future COVID-19 waves.