To prevent such a risk, the statement said, Tanzania had "decided to elevate and enhance prevailing preventive measures, especially those with regard to international travel."
There will also be "enhanced screening" of travellers and a mandatory 14-day quarantine for travellers from countries with new variants and those who have travelled there in the last 14 days.
While staying in the country, the statement said, visitors will be required to adhere to preventive measures including mask wearing, sanitising and social distancing.
Magufuli, who died in March, had urged Tanzanians to shun mask-wearing and also denounced vaccines as a Western conspiracy, frustrating the World Health Organisation and local critics.
Reuters