Astellas Pharma paused the screening and dosing of an investigational gene therapy for patients with X-linked Myotubular My-opathy (XLMTM) following a serious adverse event report in a trial participant.

Three new conditions reported by a small number of people after vaccination with Covid-19 shots from Pfizer and Moderna are being studied to assess if they may be possible side effects, Europe’s drugs regulator said on Aug. 11.

AstraZeneca’s Covid-19 vaccine carries a small extra risk of rare blood clots with low platelets after the first dose and no extra risk after the second, a study led and funded by the drugmaker showed on July 28, after worries over side effects.

Europe’s medicines regulator added a rare nerve-degenerating disorder, Guillain-Barré syndrome, as a possible rare side effect from Johnson & Johnson’s Covid-19 vaccine after the European Medicines Agency reviewed 108 cases reported worldwide.

The United States is reviewing the need for a third Covid-19 booster shot among residents who have already been vaccinated but needs to see more data to know if additional shots could raise people’s risk of serious side effects, a U.S. health official said July 13.

Europe’s drug regulator on June 11 identified another rare blood condition as a potential side effect of AstraZeneca’s Covid-19 vaccine and said it was looking into cases of heart inflammation after inoculation with all coronavirus shots.

Leaked documents from provincial and municipal governments in China reveal a slew of previously unreported severe adverse events related to Covid-19 vaccines made and administered in China.

Fewer Europeans trust the AstraZeneca Covid-19 vaccine after several countries reported side effects, such as blood clots, an opinion poll by YouGov showed on March 22, even though scientific studies have found it is safe and effective.

Top U.S. Food and Drug Administration regulators said most Americans with allergies should be safe to receive the Covid-19 vaccine developed by Pfizer Inc. and Germany’s Biotech SE.

Pfizer Inc. said participants were showing mild-to-moderate side effects when given either the company’s experimental coronavirus vaccine or a placebo in an ongoing late-stage study.