Biology, asked by Anonymous, 6 months ago

What Is Swine flu............​

Answers

Answered by Anonymous
4

Explanation:

A human respiratory infection caused by an influenza strain that started in pigs.

Swine flu was first recognised in the 1919 pandemic and still circulates as a seasonal flu virus. Swine flu is caused by the H1N1 virus strain, which started in pigs.

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