The first big real-world study of the Pfizer/BioNTech vaccine to be independently reviewed shows the shot is highly effective at preventing COVID-19.

A new coronavirus variant that shares some similarities with the one in South Africa is on the rise in New York city.

The country has lost eight patents to the disease, bringing the death toll to 1,847.

Its effectiveness varied from 72 per cent in the United States to 66 per cent in Latin America and 57 per cent in South Africa.

In countries where no significant proportion of the population is vaccinated, there is a huge risk of sustained community spread of Covid-19.

On Friday President John Magufuli asked Tanzanians to pray for three days, as reported by media