Severe acute respiratory syndrome: Capture-recapture method should be used to count how many cases of SARS really exist

EDITOR—Parry suggested that the epidemic of the severe acute respiratory syndrome (SARS) is beginning to slow.1 This is probably true as cold and influenza viruses naturally dissipate during the summer (nonflu season2). This observed reduction would include the coronaviruses, which have been estimated to result in around 30% of the reported …