The U.S. has been monitoring for the coronavirus in wastewater since the CDC launched its National Wastewater Surveillance System in September 2020. But that testing mainly involves wastewater from households or buildings, not samples from airports or planes.
Currently, people in the United States need to first get two doses of the original COVID vaccine spaced a few weeks apart, followed by a booster a few months later. ...
A US military study suggests that people who are unvaccinated against COVID-19 and those with moderate or severe infections are at significantly higher risk for persistent symptoms for 1 to 6 months.
There has been widespread scepticism over China's official COVID data since it abruptly axed anti-virus controls last month that had shielded China's 1.4 billion people from the disease for three years. ...
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