Immune Response

Pfizer and its German partner have asked U.S. regulators to clear their updated COVID-19 vaccine for children as young as 6 months of age, the companies announced on Dec. 5.

Swiss naturopathic physician George Della Pietra believes people worldwide should be free to choose whether to get a COVID-19 vaccine injection or not. He believes...

NBC News told parents worried about their children getting sick this winter to keep them away from "unvaccinated" people.

If you or a loved one has needed an organ transplant, you know the problem firsthand: There are not enough organs for those who need them and there is a long waiting period.

Analysis estimates that only 17.2% of the Chinese population have immunity from the virus.

Since receiving her latest booster shot less than two months ago, CDC Director Rochelle Walensky has again tested positive for Covid.

A medical board has moved to strip top cardiologist Dr. Peter McCullough of his certifications in internal medicine and cardiovascular disease, claiming that he provided misleading medical information to the public about COVID-19 vaccines.

Cole said the vaccines are formulated for a strain of the virus that is extinct, but the spike protein in the injections is from the original Wuhan strain and is causing these health problems.

The city of Shanghai announced the first large-scale COVID-19 inhalation booster campaign.

The effectiveness of the Pfizer and AstraZeneca COVID-19 vaccines turns negative against severe COVID-19 months after administration, according to a new study.