Wednesday, November 18, 2020

Moderna's coronavirus vaccine can cause severe fatigue and aches and pains. Two top vaccine experts told us why they think you'll still take it.

The biotech company Mordena provided a summary of the side effects its vaccine can cause when it reported positive interim results for the vaccine in a press release.


Mordena's vaccine, like pfizer , is more than 90% effective. Both vaccines use messenger-RNA-based technology, and their apparent success bodes well for the new vaccine platform. Pfizer didn't provide information on side effects, but said there were no serious safety issues with its vaccine.

However, like most good things in life, where there is a benefit, risks must be considered as well.

The one serious side effect that occurred after the first dose was injection site pain, reported by 2.7% of participants.

Here are the severe side effects that people in the trial reported after the second dose:

  • Fatigue in 9.7% of participants
  • Muscle aches in 8.9%
  • Joint aches in 5.2%
  • Headache in 4.5%
  • Pain at the injection site in 4.1%
  • Redness around the injection site in 2%

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