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  • 17-02-2022
  • Health
contestada

It's tricky to develop a vaccine for the common cold because: *

1. All colds are caused by bacteria.

2. The common cold isn't caused by pathogens.

3. Many different viruses cause cold symptoms.

4. The cold virus has no antigens.​

Respuesta :

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  • 17-02-2022

Answer:

3. Many different viruses cause cold symptoms

Explanation:

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