Answer:
maintaining elevated breathing and heart rate
It's true: Until contagious childhood diseases could be prevented by vaccines, a case of scarlet fever required a sequestration of the invalid for six weeks.
I think it’s the first and the last one? I know it has to do with intensity(how hard), frequency(how often) and duration(how long). I hope this helps I don’t know much about this subject but I want to help you :(
According to Mayo Clinic, some controllable risk factors for infectious diseases include hygiene, vaccinations and food preparation methods. Changing these factors can have a significant impact on reducing the risk of contracting an infectious disease.
