The true scale of swine flu
The official figure for the number of people who've contracted swine flu stands at 6,538.
But it seems increasingly likely that this "official statistic" significantly underestimates the true scale of the problem.
The figures are compiled by the Health Protection Agency, and are based on the number of laboratory confirmed cases - that's people who have undergone a swab-test for the virus that has proved positive for infection.
But if you ring your GP today and try to make an appointment complaining of flu-like symptoms, the chances are you'll be told to stay at home, try and get your fever down, and get some rest.
In the vast majority of cases, where the infection is proving to be quite mild, that's good, sensible advice. It certainly helps to minimise the spread of infection around the doctor's surgery, but obviously if no test is conducted no report is forwarded to the Health Protection Agency and the case doesn't show up in the official statistics.
The result is that there's really no way to be sure exactly how many people have contracted the swine flu virus. Although it seems likely that the true scale of the epidemic is significantly higher than the official estimate.
So does that matter?
It should be stressed that in most cases a bout of swine flu seems to produce only mild illness - fever, fatigue, lack of appetite and coughing. In only a very small number of cases the symptoms have been more serious, requiring admission to hospital, and there have been three deaths across the UK.
Anyone experiencing more serious symptoms, including prolonged high fever, nausea and vomiting, or who may be in a high risk category or suffering from an underlying medical condition, is still being urged to seek medical attention.
But for most people it seems, a bout of swine flu may result in less serious illness than traditional seasonal flu.