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cause the disease in themselves, into 20 volunteers, following successful tests on animals.
The volunteers' immune systems were found to be as good as those of people who have naturally
contracted the infection through a mosquito bite and recovered.
112- The passage states that scientists……… .
A)have just been successful in finding an effective vaccine against malaria
B)illegally carried out tests on more than 500 people
C)forced people to take part in their experiment to find a cure for malaria
D)have been looking for a way to protect people from malaria for over two decades
E)have so far found approximately one million volunteers to take part in their tests
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