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DO you remember what it was like when SARS hit China? Schools were closed, there were few people on the bus, and everyone wore face masks (口罩).
The vaccine is made of dead SARS cells (细胞). As the cells are dead they can be put into somebody without hurting them. When the cells are put into someone, their body will make antibodies (抗体) to fight (对抗) the disease. This means that if they ever get SARS in the future, their body will be able to fight it. From monkeys to men The Government started work on the vaccine in April. It has had to go through many tests to make sure it is safe. On October 13, scientists started testing the vaccine on animals. They gave the vaccine to 18 healthy monkeys. Two weeks later, they gave the monkeys SARS. But none of the monkeys died! All of them lived because of the use of the vaccine. Now it is time for the vaccine to be tested on people. Such tests usually have three steps. The vaccine is first tested on a small number of people, about 200. By the third step, it is being tested on 1,000 people!
Anyone can test the vaccine if they are healthy and below 65. Old people can't test it as they die easily of SARS. SARS has killed 774 in the world since April this year. Over 8,000 people got the disease during that time. |