Answer:The immune system is a network of cells, tissues and organs that work together to attack pathogens that try to invade your body. Bacteria, parasites and fungi that may cause infection meet a system of immune soldiers, including T-lymphocytes, macrophages and neutrophils.
Explanation:
By wearing a mask and social distancing
One thing you could do in order to measure your cardiovascular strength, you can do a full sprint. In order to improve this you can swim, jog, run, body weight exercised, and a balance diet.
Answer:
Because they can be really really bad for you and sometimes if they get too bad you could die. Or sometimes spread it to someone else.
