- Not brushing your teeth
- Eating so much sweets and chocolate or sugary foods
- Consuming too many acidy foods such as vinegar
- Smoking
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Tooth decay caused by bacteria. It begins when bacteria in your mouth make acids that attack the tooth's surface.
AIDS is a disease caused by the HIV virus. This is different than a bacteria.
No, a virus is much smaller than bacteria.
by a virus or by a virus in the air
Bacteria and viruses can breed. i.e. When bacteria breeds, they form large colonies visible to the naked eye When viruses breed, they become more deadly or mutate but are still virtually invisible to the naked eye.
bacteria size ranges in micrometer i.e. 10-6m virus size ranges in nanometer i.e. 10-9m