The participants taking part in phase 3 clinical trials for the Moderna and Pfizer vaccine candidates are reporting troublesome side effects such as fever, headaches, and exhaustion after receiving the drugs. While the symptoms were at times intense, the study subjects said they went away after a day.
According to CNBC, phase 3 clinical trials are the critical last step in determining the safety of a potential COVID-19 vaccine, and the study participants said the discomfort was worth the price of protection against the virus. One trial participant testing Pfizer’s drug woke up shaking so hard he cracked a tooth, according to CNBC.
Moderna and Pfizer both acknowledged in a preprint study that their vaccine could cause symptoms similar to COVID-19. The potential side effects include muscle aches, chills, and headaches, according to CNBC. Several drug companies have adjusted their higher doses in response to severe reactions to the drugs from study participants.
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