So Covid-19’s back in the West. Who’s most likely to get it again?

Clear takeaway: Anyone still dragging their heels on getting boosted in the US should reconsider when the updated shots arrive in a few weeks. — AFP

A NEW study is offering data to back one of the core assumptions about the spread of Covid-19: The intensity of exposure to the virus matters, and vaccines and prior infections can only help so much – but they do indeed help.

The research, led by scientists at the Yale School of Public Health and published in the Nature Communications journal, also reinforces the common-sense notion that masks and air filtration can augment the protection provided by a vaccine and lower the risk of getting the virus.