“We are aware of the case,” a spokesperson said, adding the matter had been referred to Swiss drugs regulator Swissmedic.

The canton did not release details including the time that elapsed between when the person received the shot and when the death occurred.

Lucerne was the site of the first vaccinations in Switzerland beginning last week, with a shot from Pfizer and its German partner BioNTech given primarily to elderly people. Switzerland has received 107,000 vaccine doses, so far, and expects to get 250,000 per month starting next year.

Swissmedic could not immediately be reached for comment.

An email and phone call to Pfizer were not immediately returned.