Intravenous mixtures are prepared in sterile conditions. They are infusions that are given through injections and syringes. It is important to keep the preparation sterile as it is directly injected to the veins which is a faster way to assimilate to the system. Thereby, proper preparations must be applied. ANswer is D.
Cartilage ear piercings may take up to a year to fully heal, but generally take 3-6 months (as opposed to the ear lobe, that takes just 4-6 weeks). They heal from the outside in, so even if it looks fine on the outside, you should not assume it is fully healed.
answer: the brain continues to exhibit in both size and weight
They can if they want to, but if they do they will infect whoever they are doing it with. No one can stop them. But if you are looking for a definitive answer then no, it is not okay at all because of the risk they are putting other people at. Especially because STDs are with you forever, they never go away.
Hope this helps!!