Should a third dose of Covid vaccine be recommended for the general population? Some say it is vital to boosting immunity as the Delta variant spreads, while others say precious vaccines should go to countries, mostly in the Global South, where most people haven't even had their first jab.
France was among the first countries to start distributing third jabs to the elderly and people with compromised immune systems, among others.
Those eligible can get the shot six months after their second dose. Countries who are offering the shots say the additional dose is justified because vaccines have reduced efficacy against the Delta variant that diminishes over time.