Among more than 7m vaccine doses, scientists are investigating six cases of women between 18 and 48 who developed a rare blood clot, one that critically needs to be treated without heparin, a common blood thinner.
The pause has caused concern worldwide, among health professionals and ordinary citizens. Here are some of the key questions being asked:
What is happening with the J&J vaccine?
US health officials “paused” distribution while a potentially serious clotting syndrome is investigated. Among the 7.2 million people who received the vaccine, just six cases were discovered. (.0000833333333333%)
In all six cases, the potential side-effect occurred between six and 13 days post-vaccination, after the period when people’s common and usually mild flu-like side-effects are resolved. Health officials advised that people suffering from a severe headache, leg or abdominal pain or shortness of breath should tell their doctors if they were recently vaccinated.