There have been 40 confirmed swine flu cases, the majority — 28 — associated with a single preparatory school in Queens, some of whose students visited Mexico recently.
Only four states other than New York have confirmed cases: seven in California and one or two in Texas, Ohio and Kansas. The illnesses have all been mild; only one patient was hospitalized and no one has died. Four or five days after seeing the first signs of swine flu in New York City, there is still no evidence that it has spread further.
Where Will the Swine Flu Go Next?：
Influenza pandemics have occurred as far back in history as we can look, but the four we know about in detail happened in 1889, 1918, 1957 and 1968. The mildest of these, the so-called Hong Kong flu in 1968, killed about 35,000 people in the United States and 700,000 worldwide. Ordinary seasonal influenza, in comparison, now kills 36,000 Americans a year, because the population has a higher proportion of elderly people and others with weak immune systems. (If a virus like the Hong Kong flu hit today, it would probably kill more people for the same reason.)
The worst influenza pandemic, in 1918, killed 675,000 in the United States. And although no one has a reliable worldwide death toll, the lowest reasonable number is about 35 million, and some scientists believe it killed as many as 100 million — at a time when the world’s population was only a quarter of what it is today. The dead included not only the elderly and infants but also robust young adults.
What’s important to keep in mind in assessing the threat of the current outbreak is that all four of the well-known pandemics seem to have come in waves.
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