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Your article makes a common error. Whereas chicken pox is caused by one virus, a “cold” is a set of symptoms that can be caused by more than 200 distinct viruses. A better example for short-term immunity might have been pertussis or tetanus. Jennifer L. Bankers-FulbrightMayo ClinicRochester, Minn.
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Faulty Memory: Long-term immunity isn’t always beneficial
Quickly losing immune-system defenses against some viruses may protect humans from far nastier bugs, a mathematical model suggests.
- Planetary Science
Galileo’s Demise: A planetary plunge, by Jove
Out of fuel and according to plan, the Galileo spacecraft ended an 8-year tour of Jupiter and its moons on Sept.
