In other words, unconfirmed cases represent either 80% or 35% of total infections, respectively.
The exact number of cases in the United States is uncertain, though a recent survey by two American doctors put it at 22 in the same period; the survey also estimated 26 unconfirmed cases in Europe, for a total of 48 worldwide so far.
In the past several years, suspected unconfirmed cases have been reported from Zamboanga del Norte Province in western Mindanao.
Although we found no difference in the value of R for studies using confirmed cases versus unconfirmed cases in the estimation method, the trade-off between the accuracy of the less specific but more efficient and cost effective syndromic data compared to laboratory-confirmed influenza infections is unknown.
Second, while most cases ascertained in the traveler population to date have been mild, one nonetheless expects that many mild cases (as well as probable but unconfirmed cases) in travelers are absent from our calculations.
Indeed, national reports on trends in malaria cases from most countries in Africa simply reflect the number of unconfirmed cases captured through the HMIS system [3].
The greater reduction in SIR, after the exclusion of unconfirmed cases, was noted for cancer of the lung (SIR=1.3) and brain (SIR=0.0) (not shown).
A severe presentation was also more common in patients with confirmed AH versus unconfirmed cases (80%% [97/122] vs. 43 % [45/106]; P < 0.001).
Exclusion criteria were: unconfirmed cases, patients not seen in the hospital and with missing case notes.
(Of those, 149 unconfirmed cases have been reported in the U.S). But, not to mitigate the impact of SARS, the world is full of bloodcurdling diseases that, in many cases, have been around for millennia.
