June 29, 2021 ~ New York Times ~ by Roni Caryn Rabin

W.H.O. Urges Masking for the Vaccinated, in Split With C.D.C

Another city in Australia enters a lockdown as the Delta variant spreads. Mixing vaccines from Pfizer and AstraZeneca provides strong immunity, researchers find.

Here’s what you need to know:

  • Worried by the Delta variant, W.H.O. officials urged vaccinated people to keep wearing masks.

  • Mixing Pfizer and AstraZeneca vaccines provides strong protection, according to a preliminary study.

  • A study finds that the Pfizer and Moderna vaccines could offer protection for years.

  • A third dose of the AstraZeneca vaccine is found to boost immune response.

  • Hong Kong bars passenger flights from Britain.

  • As the Northwest broils, officials rate cooling off a higher priority than Covid precautions.

  • Migrant workers flee Bangladesh’s capital ahead of a new lockdown.

  • Australia faces simultaneous outbreaks, fueled by the Delta variant.

Worried by the Delta variant, W.H.O. officials urged vaccinated people to keep wearing masks.


World Health Organization officials, concerned about the easing of precautions meant to stop the spread of the coronavirus even as the most contagious variant to date has emerged, have urged even fully vaccinated people to continue wearing masks and to keep taking other measures to prevent infection.

The Centers for Disease Control and Prevention, on the other hand, told fully vaccinated Americans in May that they no longer needed to wear masks indoors or to maintain a distance of six feet from other people. The agency also eased advice about testing and quarantine after suspected exposure to the virus.

Asked on Monday about the new cautions expressed by the W.H.O. — the world’s largest public health organization — a C.D.C. spokesman pointed to the existing guidance and gave no indication it would change.

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