1. Infected needles
2. Insect bite
3. Organ transplant
4. Blood transfusion
If some living things do not reproduce this could be considered a defect or a genetic mutation in those people. If we take humans for example, if most humans reproduce and some don't because they cannot (if a guy cannot produce sperm) this doesn't mean that he isn't alive, it just means he was born with a genetic mutation which doesn't allow him to produce sperm needed for reproducing.
Being around people you like and are good for you
Answer:
That is either the knee or the elbow
Explanation:
The bursitis is inflammation in the joints that causes fluid filled pads for cushioning.