He and his team were stunned by the number of mutations. They felt they'd made a contribution by alerting the world to a dangerous variant. Then came the travel bans for residents of southern Africa.
With surging coronavirus infections and countries making it more difficult for the unvacccinated to travel, some vaccine skeptics are now coming around.
A new study from the University of Hong Kong offers preliminary information that could explain why this new coronavirus variant may be more transmissible.
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.