In 1776, edward jenner started the war against smallpox. the war continued until 1977, when the world health organization declared the world free of smallpox. this is a good example of how the contributions of one individual can change the world of medicine how preventative medicine can overcome disease how medical research can solve problems all of the above

A. hannah wants to improve her cardiorespiratory fitness levels, so she begins to alternate running on a flat track with running up stadium stairs. this principle is known as a type b tedium c time d frequency 2. charlie is easily winded during soccer practice and wants to improve his cardiorespiratory fitness. which activity would be best for him to choose? a lifting weights b walking from one class to another c running in a 5k race d riding a bike at a leisurely pace 3. felicia just began running this past month, but since she continues to run the exact same route and exact same distance every day, she is growing bored with her runs. this principle is known as a tedium b progression c specificity d reversibility

Mary has spontaneously decided to prepare a meal for friends. she is beginning to prepare fin fish and realizes she wants to also prepare a hearty dish ready to serve at the same time. what should she prepare?

Megan is 16 years old and overweight. she loves junk food and chocolate. a 10 minute walk to school is her only exercise every day. which is the best method to megan lose weight