Coronavirus vaccine study enters final stage in US
A single-dose Covid-19 vaccine being developed by the company (Johnson & Johnson/AP)
Johnson & Johnson is beginning a huge final study to try to prove if a single-dose Covid-19 vaccine can protect against the disease.
The study starting on Wednesday will be one of the world’s largest coronavirus vaccine so far, testing the shot in 60,000 volunteers in the US, South Africa, Argentina, Brazil, Chile, Colombia, Mexico and Peru.
