Answer:
Herd immunity occurs when a large portion of a community (the herd) becomes immune to a disease, making disease transmission unlikely from person to person. As a result, the entire community — not just those who are immune — is protected.
Explanation:
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I can only answer it by what it means, approaching darkness: it makes it more serious and mysterious
The pros of keeping fit are that your body and heart dont have to work as hard, you will generally have more energy at all times and feel better physically and mentally. the cons are that it can be time consuming to exercise daily and you may not have time to do that, also you may be tired after working out and you have to keep to a steady diet of healthy foods, which can be difficult for some people
