What are the common side effects of the Janssen COVID-19 vaccine?
What are the common side effects of the Janssen COVID-19 vaccine?
The most commonly reported side effects were pain at the injection site, headache, fatigue, muscle aches and nausea. Most of these side effects occurred within 1-2 days following vaccination and were mild to moderate in severity and lasted 1-2 days. Feb 16, 2022