The CDC recommends mRNA COVID-19 vaccines over J&J’s, citing fewer risks
Pfizer’s and Moderna's vaccines are more effective and cause fewer serious side effects, new data show
![photo of someone holding a vial of the J&J covid vaccine with a syringe](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2021/12/121621_ts_jj-vaccine_feat.jpg?fit=1030%2C580&ssl=1)
While the benefits of Johnson & Johnson’s COVID-19 vaccine outweigh the risks, mRNA vaccines are preferred because they’re more effective with fewer serious side effects, a federal advisory committee said.
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