Answer:
no it's not necessary to make all the things public
Answr: F
EXPLAIN: Becaude the F is the only correctly answer.
The reason why one case of influenza does not confer lifelong immunity is that the virus tends to mutate overtime which makes it unrecognizable to the immune system.
<h3>Why is it difficult to get immunity to influenza?</h3>
Influenza is caused by a virus which tends to mutate overtime in order to stay ahead of medical technology.
As a result, this mutation makes the original virus unrecognizable to the immune system which would then be unable to fight it.
Find out more on natural immunity at brainly.com/question/21480961
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Answer:
The answer is explained below
Explanation:
- Per capita GDP of US in 2020 is expected to touch 56200 USD by the end of 2020
- Per capita income is the average of the income earned by people of a country in a particular year. It is calculated by dividing the total income of country by its total population.
- GDP per capita in Japan is expected to reach 495000 USD by the end of first quarter of 2020 and it will reach around 50900 USD by the end of 2020.
- GDP per capita of Haiti is expected to be 765.00 USD by the end of 2020. It was 784 USD in 2019.
- GDP per capita of Saudi Arabia in 2019 was 197 USD , It is expected to reach 20912 USD in 2020.
- We can say that GDP per capita of USA is more than other three countries, it will still continue to be higher than GDP per capita of Japan in 2020.
