A pharmacy manager draws up a Covid-19 vaccine at a mass vaccination site in Washington state, US, as new variants threaten the efficacy of existing jabs. Photo: Reuters A pharmacy manager draws up a Covid-19 vaccine at a mass vaccination site in Washington state, US, as new variants threaten the efficacy of existing jabs. Photo: Reuters
A pharmacy manager draws up a Covid-19 vaccine at a mass vaccination site in Washington state, US, as new variants threaten the efficacy of existing jabs. Photo: Reuters

As coronavirus mutations undercut vaccine optimism, US scientists warn of a long fight

  • Covid-19 vaccines hold hope of ending the pandemic – but mutations that are at least partially resistant to antibody treatment are spreading worldwide
  • Drug makers are looking at bivalent vaccines but scientists say Covid-19 could morph into something like influenza that requires periodic booster shots

Topic |   Coronavirus pandemic
A pharmacy manager draws up a Covid-19 vaccine at a mass vaccination site in Washington state, US, as new variants threaten the efficacy of existing jabs. Photo: Reuters A pharmacy manager draws up a Covid-19 vaccine at a mass vaccination site in Washington state, US, as new variants threaten the efficacy of existing jabs. Photo: Reuters
A pharmacy manager draws up a Covid-19 vaccine at a mass vaccination site in Washington state, US, as new variants threaten the efficacy of existing jabs. Photo: Reuters
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