By LAURAN NEERGAARD AP Medical Writer

WASHINGTON (AP) — The most widely used COVID-19 vaccines may offer a surprise benefit for some cancer patients by boosting their immune systems to help fight tumors. Research reported Wednesday in the journal Nature found that people with advanced lung or skin cancer lived longer if they received a Pfizer or Moderna shot within 100 days of starting a type of immunotherapy. The mRNA in these vaccines appears to enhance the immune system's response. Now the research team is preparing a more rigorous study of the potential connection, to see if mRNA vaccines should be deliberately paired with cancer drugs called checkpoint inhibitors.

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