Vaccine stocks fell sharply in morning trading as Pfizer is 33% effective in preventing Omicron infection.On Tuesday, Ryan Noac, CEO of Discovery Health Ltd., South Africa's largest health insurance provider, said at a news conference that two dosesPfizerThe protection rate of vaccine against admission after infection with Omicron variant strain is 70%, which is suitable for people of all ages and suffering from various chronic diseases.
Pfizer is 33% effective in preventing Omicron infection and 80% effective in preventing Delta infection.
This study is based on the results of 211,000 COVID-19 positive tests from November 15th to December 7th, of which about 78,000 were Omicron patients.
The study also shows that Omicron has a high risk of reinfection, and the Omicron strain accounts for more than 90% of South African cases.