International
Having an mRNA COVID-19 vaccine and an influenza vaccine at the same time could increase the chances of side-effects, according to an international study of self-reported vaccination data from over 980,000 people. The survey found that compared with people who received the COVID-19 mRNA booster alone, people who received a simultaneous seasonal influenza vaccine were significantly more likely to report reactions such as fatigue, headache, and muscle soreness. An accompanying editorial indicates that while the results are significant, a placebo trial may be required to ensure that the results reflect an actual reaction to the combination of vaccines.
From:
About The Study: In this study of self-reported data from 980,000 people, compared with administration of COVID-19 mRNA booster vaccines alone, simultaneous administration of COVID-19 mRNA booster and seasonal influenza vaccines was associated with significant increases in reports of systemic reactions in the week following vaccination.
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