The Latest: WHO head raises questions about vaccines

The head of the World Health Organization said the emergence of new COVID-19 variants has raised questions about whether or not existing vaccines will work, calling it “concerning news” that the vaccines developed so far may be less effective against the variant first detected in South Africa.
At a press briefing on Monday, Tedros Adhanom Ghebreyesus said South Africa’s decision to suspend its vaccination campaign using the AstraZeneca vaccine is “a reminder that we need