Published by Reuters By Michael Erman NEW YORK (Reuters) – All three U.S.-authorized COVID-19 vaccines appear to be significantly less protective against the newly-detected Omicron variant of the coronavirus in laboratory testing, but a booster dose likely restores most of the protection, according to a study released on Tuesday. The study from researchers at Massachusetts … Continue reading U.S. study suggests COVID-19 vaccines may be ineffective against Omicron without booster