Pharmacies in Tower Hamlets don't stock Tamiflu these days. The east London borough has Britain's highest swine flu rate, and the drug is only available at a secret distribution center.
Up to 400 people flock every day to the centre, near the working-class district's Mile End hospital, which is on the frontline of the swine flu pandemic gripping Britain harder than any other European country.
"We've got more swine flu cases per head of population than anywhere else in England. That means we're experiencing it first," said Dr. Douglas Russell, medical director of the National Health Service (NHS) in Tower Hamlets.
Doctors and nurses are working extra hours and extra shifts, with some cancelling holidays, to meet the demand -- last week there were 792 doctors' consultations for every 100,000 people.
"We've experienced significant additional pressure but I think everyone is coping," said Russell.
The infection rate in Britain as a whole almost doubled last week, with an estimated 100,000 new cases, while at least 30 people with the virus have died, in a scenario which could be repeated in other European countries, experts say.
To limit the spread, health authorities are asking people with the A(H1N1) virus to stay at home, and send a so-called "flu friend" to fetch the precious anti-viral drug.
Tower Hamlets, which has a large young population and Britain's biggest Bangladeshi community, is pulling out all the stops to advise people how to avoid swine flu, and what to do if they think they have it.