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There is "increasing evidence of a potential effect on memory and cognition” for older cannabis users, according to a new Canadian study.
The new coronavirus variant surging in China has arrived in the US. Here’s what to know about Nimbus
A new Covid-19 variant called NB.1.8.1, or Nimbus, represents about a third of new US Covid-19 cases. Dr. Leana Wen answers ...
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