Mix-and-match approach boosts immune response of AstraZeneca shot, study finds - Reuters UK

1. Mix-and-match approach boosts immune response of AstraZeneca shot, study finds  Reuters UK
2. Australia rushes to contain COVID surge with only 5% vaccinated | DW News  DW News
3. Covid Updates: W.H.O. Urges Masking for the Vaccinated, in Split With C.D.C.  The New York Times
4. US Covid-19 response faces doozy of a challenge: Vaccinating kids  CNN
5. The weakness of Australia’s Covid response has been laid bare. We can’t afford any more screw-ups  The Guardian
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