So far, the available evidence shows that WHO-approved vaccines are effective in reducing the likelihood of infection and preventing hospitalization and death from COVID-19.
WHO is working with technical partners to assess the performance of current vaccines against Omicron and will communicate these findings as soon as they become available. Preliminary data shows that available vaccines recognized by WHO continue to protect against severe disease, hospitalization and death regardless of the variant.
Currently, the Delta variant is dominant worldwide and COVID-19 vaccines approved by WHO are highly effective at protecting you from serious illness and death, including from infection with Delta.
It is important to remember that re-infection even in vaccinated individuals might happen with all the variants, and therefore all the public health measures should be maintained and reinforced to prevent getting and spreading the virus. Since no vaccine is 100% effective, it is necessary to continue with all preventive measures, even after vaccination: constant hand hygiene, use of masks, sneezing or coughing into the elbow, keeping a distance of at least 1 meter from other people, avoiding crowds and keeping spaces well ventilated, are measures that should continue to be practiced to prevent COVID-19 infection.
Last update: 4 January 2022
More questions and answers about COVID-19 vaccines