Explanation: This is the answer because when you exercis on a regular basis then you are on a time limit and you can stay on track because if you stop it will become a habit and make your body unhealthy
the answer to your question is D ☺
if you throw up, you'll feel better. but you can chew on ice cubes or lay down. thats what I do. btw this website is for hw questions
Medical Definition of Vaccination. Vaccination: Injection of a killed microbe in order to stimulate the immune system against the microbe, thereby preventing disease. ... To immunize against viral diseases, the virus used in the vaccine has been weakened or killed.