First coronavirus vaccines 'may not prevent infection', UK task force head warns

Kate Bingham, the chair of the UK's vaccine task force, has warned that a first-gen Covid-19 vaccine "is likely to be imperfect" and "may not prevent infection."

"The Vaccine Taskforce aims to ensure that the UK population has access to vaccines as soon as possible, while working with partners to support equitable access for populations worldwide, whether rich or poor," Bingham wrote on The Lancet. "However, we do not know that we will ever have a vaccine at all. It is important to guard against complacency and over-optimism. The first generation of vaccines is likely to be imperfect, and we should be prepared that they might not prevent infection but rather reduce symptoms, and, even then, might not work for everyone or for long."

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