Exclusive: WHO estimates COVID-19 boosters needed yearly for most vulnerable

FILE PHOTO: A logo is pictured outside a building of the World Health Organization (WHO) during an executive board meeting on update on the coronavirus disease (COVID-19) outbreak, in Geneva, Switzerland, April 6, 2021. REUTERS/Denis Balibouse

BRUSSELS (Reuters) - The World Health Organization (WHO) forecasts that people most vulnerable to COVID-19, such as the elderly, will need to get an annual vaccine booster to be protected against variants, an internal document seen by Reuters shows.

The estimate is included in a report, which is to be discussed on Thursday at a board meeting of Gavi, a vaccine alliance that co-leads the WHO's COVID-19 vaccine programme COVAX. The forecast is subject to changes and is also paired with two other less likely scenarios.