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Controlling Covid-19 requires immunizing 60-70% of the population against the novel coronavirus, a senior World Health Organization (WHO) official said.
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This level is based on several modeling studies, said Catherine O’Brien, WHO Head of Vaccines.
However, he stressed that the actual level of immunization required in this pandemic will only become clearer when the vaccines currently being tested become better known.
In addition to knowing how well vaccines prevent Covid-19, there is a question of whether they will make it more difficult for the virus to be transferred from one person to another, O’Brien said.
In recent days, pharmaceutical companies AstraZeneca, Moderna and Pfizer / BioNTech have announced promising test results for their coronavirus vaccines.
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