The United Republic of Tanzania, January 2023 Travel Advisory states:
All travelers are advised to be fully vaccinated.
All travelers entering or transiting are no longer required to present a COVID-19 vaccination certificate or RT-PCR certificate or perform Rapid Antigen Test on arrival UNLESS stated otherwise by conveyance to be used for country of their final destination.
On arrival, thermal and physical screening will be done. Passengers found to be symptomatic will be immediately isolated and handled as per health protocol.
Prior to departure for Tanzania, travelers must check requirements for their destination country when departing Tanzania or conveyance to be used.
All travelers should self-monitor their health post arrival in Tanzania and report to their nearest health facility.
Please be sure to check the Tanzania entry/exit requirements on an ongoing basis.