The Pfizer-BioNTech vaccine use mRNA to generate antibodies. Photo: Reuters The Pfizer-BioNTech vaccine use mRNA to generate antibodies. Photo: Reuters
The Pfizer-BioNTech vaccine use mRNA to generate antibodies. Photo: Reuters

Coronavirus mutations pose challenge to vaccine makers

  • Studies send mixed messages whether the Pfizer-BioNTech vaccine will be able to tackle the variant that emerged in Britain
  • New strains of the virus add to challenge of fighting Covid-19

Topic |   Coronavirus pandemic
The Pfizer-BioNTech vaccine use mRNA to generate antibodies. Photo: Reuters The Pfizer-BioNTech vaccine use mRNA to generate antibodies. Photo: Reuters
The Pfizer-BioNTech vaccine use mRNA to generate antibodies. Photo: Reuters
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