The United States says Tanzania has not publicly released any data on COVID-19 in two weeks as concerns rise about the true number of cases there.
The World Health Organization also has openly worried about Tanzania, whose president has questioned his own government's virus testing and refused to close churches in the belief that the virus can't survive in the body of Christ.
A new US Embassy statement warns that the risk of being infected in Tanzania's commercial hub Dar es Salaam is extremely high and says many hospitals in the city have been overwhelmed.
It says all evidence points to exponential growth in cases in the East African nation. The country has more than 500 confirmed cases and 21 deaths, according to the Africa Centres for Disease Control and Prevention.