Washing hands and covering coughs
Answer:
the branch of medical technology that seeks to create replacement tissues or organs. Engineers often start with existing tissue, such as bone or skin. Now, new tissue can also often be generated from stem cells, which are special growth and repair cells that can be found in embryos, blood, fat, and marrow.
Explanation:
If you have had sex you should get checked. but some peoples periods arent regular all the time
