“This is an accommodation that is expected to be of interest to a small minority of J&J vaccinees,” the San Francisco Department of Public Health said in a statement.

Mevorach agrees that awareness among vaccinees, their parents, and their doctors is important for prompt and effective treatment.

So far, U.S. regulatory agencies have reported 15 cases of TTS in about 7 million vaccinees.

Israel has already issued a “green passport” that allows vaccinees to go to restaurants and attend public gatherings that have been barred or limited by lockdowns.

On 16 March, a group of 29 doctors and researchers wrote a letter about reported deaths of vaccinees—80 so far since the immunization drive started in January.