From today, people in Kenya will not be able to go to restaurants, funerals, or obtain in-person government services unless they are fully vaccinated.
The move had been stopped by a Kenyan court last week, but the Health Ministry says it will go ahead regardless.
There are still over 40 million Kenyans yet to receive a covid-19 vaccine.
Unvaccinated people will also not be able to access immigration, education, and port services, among others.
All public offices and affected businesses will now need to assign staff to check the certificates. Failure to do so could mean the revoking of their operating licenses.
Chief Administrative Secretary Dr. Mercy Mwangangi says the move is aimed at protecting Kenyans at all costs.
Those under 15 are exempted from this new regulation.