Answer: B: Contact between infected saliva and an open wound.
Explanation: It gets in your blood stream. For example, sharing needles.
The primary risk factors for developing cancer are:
-aging: the older the greater the risk
- smoking - the primary reason for lung cancer
- radiation and chemicals exposure
<span>- certain hormones
- alcohol
- family history of cancer,
- lack of physical activity, or being </span>overweight<span>.</span>
Tetanus and cerebrospinal meningitis are not contagious
