Wealthy countries already have agreements for 3.73bn doses, with another 5bn under negotiation, study finds. Governments in predominantly wealthy countries are negotiating to buy nearly 8.8bn doses of prospective Covid-19 vaccines in a “frenzy of deals” that could...
The head of the World Health Organization has ruled out a herd immunity response to the pandemic. Herd immunity occurs when a large portion of a community becomes immune to disease through vaccinations or the mass spread of disease. Some have argued that coronavirus...
