One shot of the Pfizer vaccine gives inadequate protection to cancer sufferers, new research suggests.
“Our data provides the first real-world evidence of immune efficacy following one dose of the Pfizer vaccine in immunocompromised patient populations.”
You don’t say. Vaccines work with the immune system, those whose immune system ain’t working well don;t respond to vaccines all that well. Or, at least, worse than those with better immune systems?