Medicine: Lifesaving Stings

The village elders of Marsella, 6,300 feet up in Colombia's Cauca Valley, weighed the arguments and gave consent —yes, it would be a good idea to give the district's youngsters inoculations against whooping cough and diphtheria. Thereupon, the traveling "sanitary educator," Roberto Agudelo Valencia, 32, jumped into his jeep, switched on the public-address system and drove around announcing a movie in the village square.

"Of course," Agudelo says, "people were terrified, since it was the first time they had ever heard a loudspeaker." But they turned out, 1,500 strong, to see a Walt Disney health film projected on the cleanest whitewashed wall...

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