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denis23 [38]
3 years ago
8

How effective was Jonas Salk’s initial testing of the polio vaccine?

Biology
1 answer:
leva [86]3 years ago
6 0

Answer:it was very effective.

Explanation:

According to report in America 1954, Salk conducted a national study, with over a million paediatric subjects wish yielded a positive outcome and on 12 April 1955, the vaccine was considered safe and efficacious. in 1955, the vaccines was used for over 29,000 cases of poliomyelitis in the US and the infection rate reduced to less than 6,000. This made Salk vaccine more recognized and it was speedily adopted worldwide reaching almost 90 countries in less than 2 years after it mass production.

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Answer:

Scientists.

Explanation:

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It is possible for the scientists because they know about environmental hazards, and by doing research, they can find any remedy.

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elena55 [62]

Answer:

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Explanation:

Photosynthesis converts carbon dioxide and water into oxygen and glucose. Glucose is used as food by the plant and oxygen is a by-product. Cellular respiration converts oxygen and glucose into water and carbon dioxide. Water and carbon dioxide are by- products and ATP is energy that is transformed from the process.

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Answer:

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