A spokeswoman for the World Health Organization said that the organization does not expect to provide immunization and prevention on a large scale from the disease Covid-19 before the middle of next year, stressing the importance of conducting accurate tests to ensure the effectiveness of vaccines and the safety of their use.
“We don’t expect there will be large-scale vaccinations before the middle of next year,” spokeswoman Margaret Harris told reporters at a briefing in Geneva.
“This third stage should take longer because we need to know the true protection provided by the vaccine, and we also need to make sure that it is safe,” she said, referring to the third stage of clinical trials of vaccines before approval for their use.