Pfizer vaccine provides less protection in cancer patients after a single dose, study finds

The Pfizer/BioNTech Covid-19 vaccine provides less protection in cancer patients than healthy individuals following a single dose, a new real-world study in the UK suggests, raising questions about whether the UK’s strategy to delay second doses should apply to such patients.The Pfizer/BioNTech Covid-19 vaccine provides less protection in cancer patients than healthy individuals following a single dose, a new real-world study in the UK suggests, raising questions about whether the UK’s strategy to delay second doses should apply to such patients.