World News

New omicron variant BA.2 is spreading quickly

New omicron variant BA.2 is spreading quickly

We already know from the first omicron variant BA.1 that it is significantly more contagious than earlier coronavirus variants. Now a subtype, BA.2, has emerged. At least 400 people have been infected with it during the first 10 days of January in the United Kingdom,...

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Cuba is shutting schools as Covid-19 surges

Cuba is shutting schools as Covid-19 surges

Facing a surge in Covid-19 cases, Cuban officials Tuesday night said they are implementing new restrictions, including shutting schools in much of the capital Havana and other parts of the island. Cuban health officials on Tuesday reported 487 new Covid-19 cases,...

Ventilation and Coronavirus (COVID-19)

Ventilation and Coronavirus (COVID-19)

An important approach to lowering the concentrations of indoor air pollutants or contaminants including any viruses that may be in the air is to increase ventilation – the amount of outdoor air coming indoors. Ensuring proper ventilation with outside air can help...

Indoor Air and Coronavirus (COVID-19)

Indoor Air and Coronavirus (COVID-19)

COVID-19 is thought to spread mainly through close contact from person-to-person. However, some uncertainty remains about the relative importance of different routes of transmission of SARS-CoV-2, the virus that causes coronavirus disease 2019 (COVID-19). Evidence now...