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Nigeria’s missed COVID-19 vaccine invention

Early in November, in reaction to the Pfizer announcement of its successful human trials, President Muhammadu Buhari said the development of...

COVID-19: Vaccines 95% positive, says Pfizer

The biotech company Pfizer has said that a completed study of its experimental Covid-19 vaccine showed it is 95 percent effective.

First COVID-19 vaccine test effective, says Pfizer

Pfizer and BioNTech say the first vaccine they have developed against COVID-19 can prevent more than 90 percent of people from...