Data from 78,000 South Africans with COVID show the Pfizer vaccine is far less effective in preventing infection by the omicron variant. But there is still significant protection from severe illness.
The variant has spread through South Africa with remarkable speed — and been detected in at least 60 other countries. Specialists are trying to figure out the next stage for this unwelcome variant.
In small studies in South Africa and in Germany, the results indicate a marked decrease in the ability of vaccines to neutralize this variant. But there are other findings that are encouraging.
There's serious concern about the effectiveness of vaccines against the omicron strain. But there's also reason to be hopeful — especially for those who've had a booster.
How did this new strain of the novel coronavirus evolve? Researchers are investigating various possibilities. One leading theory involves ... just one person.
Stocks fell on Tuesday as investors weighed the potential economic fallout from the new coronavirus variant. Federal Reserve Chair Jerome Powell said the central bank could end its bond-buying early.
President Biden has restricted travel from eight southern African countries in an effort to slow the spread of the omicron variant.
At a special session this week, the World Health Organization hopes to start sketching out a new world order. "We don't have rules of the game," says WHO head Tedros Adhanom Ghebreyesus.
It could turn out to be the eighth coronavirus known to spread to humans. Some scientists think doctors and researchers should start actively looking for this virus in patients.