Word: strains
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Dates: during 1980-1989
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College officials said that the increase in medical excuses probably does not indicate a trend. "My experience is that the number is lower than it was last year," said Jeffery Wolcowitz, senior tutor of Dunster House. "The variations [from year to year] depend on what strain of flu is going around...
...specialists, known as suppressor T cells, call off the battle. As the carnage wanes, the B cells and T cells perform a last, vastly important task: they form memory cells that circulate in the bloodstream and lymph system for many years, primed to spring into action should the same strain of flu virus ever attack again. In addition, the body is protected by specialized antibodies, strategically deployed in mucus, saliva and tears, that immediately recognize any return of this particular virus...
While a healthy immune system may take as long as three weeks to complete the job against a specific flu virus, its next response to the same viral strain reaches full force immediately, and the invaders are overcome before they can do any significant damage. In other words, the body has become immune -- but only to that specific virus. "You probably wouldn't even know you'd been reinfected," says Carl Nathan. "The immune system has a short track and a long track, and it all depends on whether it's a first encounter or you've seen it before...
...jets operated by U.S. carriers. Of those planes, 36 that have racked up more than 55,000 landings were prohibited from flying above 23,000 ft. until they could be thoroughly checked out. At higher altitudes, the cabin must be pressurized to a greater extent and more strain is put on the fuselage. Among those airlines most severely affected by last week's ruling were American and Piedmont. After inspecting the damaged jet, Joseph Nall, a member of the National Transportation Safety Board, declared, "My hope is that it will raise the consciousness" of air carriers and regulators about...
Peterkin's departure will put a strain on the Cambridge School Committee, at least in the short run, said Davis. "It's very unfortunate that he's leaving at this time," she said. "This is a great interruption in the progress of the schools to go out and look for a new superintendent...