Emerging evidence that the body's immune defence against COVID-19 may be short-lived makes it even harder for vaccine developers to come up with shots fully able to protect people in future waves of infection, scientists said on Tuesday.
LONDON - Emerging evidence that the body’s immune defence against COVID-19 may be short-lived makes it even harder for vaccine developers to come up with shots fully able to protect people in future waves of infection, scientists said on Tuesday.
“Most people make them , but often they can wane rather rapidly, suggesting there could be little immunity,” said Daniel Altmann, a professor of immunology at Imperial College London. To be truly effective, COVID-19 vaccines “will either need to generate stronger and longer lasting protection ... or they may need to be given regularly”, he said.More than 100 research teams and companies around the world are seeking to develop vaccines against COVID-19, and at least 17 are already in human trials to test efficacy.
He and other vaccine and immunology experts also said it does not necessarily follow that waning immunity in natural cases of COVID-19 infection would be the same with vaccine-induced immune response:
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