A San Francisco Bay Area man in his 30s is recuperating after developing a rare blood clot in his leg within two weeks of receiving the Johnson & Johnson vaccine, University of California, San Francisco, officials said.
The US Centres for Disease Control and Prevention had reported the condition in 15 people, all women, after 8 million doses were administered nationally. It involves unusual clots that occur together with low levels of blood-clotting platelets.
"To the best of our knowledge, this is the first male patient with VITT syndrome in the US following the US emergency authorisation of the Johnson & Johnson vaccine on February 27, 2021," UCSF said in a statement.
![The Johnson & Johnson Covid-19 vaccine is seen at a pop up vaccination site in the Staten Island borough of New York. Photo / AP](https://www.nzherald.co.nz/resizer/v2/ZH6CS7YFGFGMXB24XSF3N37I5A.jpg?auth=00ea55b102e538632d7a8ce33e66285ea924d1eb222a3f5ed3d50023ca92384d&width=16&height=12&quality=70&smart=true)
US health officials lifted an 11-day pause on Covid-19 vaccinations using Johnson & Johnson's single-dose shot, after scientific advisers decided its benefits outweigh the rare risk of blood clot. Three of the women previously identified died, and seven remain hospitalised.