The medicine regulator Swissmedic has authorized a third dose for those who are at risk.
The booster jab can be taken 6 months after the second injection. The first people to benefit will be the elderly who got the vaccine first when they were released.
Those who got a Moderna jab can have a third at half the initial dosage – those who had the Pfizer vaccine will have the same amount as before.
Those who are immunocompromised will also be entitled to a third dose.
But there is not yet a recommendation that everyone should be jabbed three times. The Federal Vaccines Commission says for most people the vaccine remains highly effective.
Geneva Finance Committee rejects budget
Initiative planned for airline tax
Births hit an all-time low
Christmas on the Quai starts next week
Steve Jobs's family came from Switzerland
Is a Trump deal close?
