Danazol is a synthetic steroid hormone used in treatment of endometriosis, fibrocystic breast disease, ...
Nine in 10 have received one dose, but in London it's much lower, figures show.
Health officials have also traced the contacts of the person, it is understood.
R remains below 1, and a survey of community infections suggest around 1-in-230 people has the virus.
Other groups have reported higher protection, but the results are still seen as a triumph.
A question everyone's asking: what's my Covid risk? Here's how to find out.
Borrowing - which hit a record £22.3bn in October - cannot go on indefinitely, chancellor says.