Answer:
Vaccines create immunity without causing illness or resulting complications. Herd immunity makes it possible to protect the population from a disease, including those who can't be vaccinated, such as newborns or those who have compromised immune systems.
Explanation:
The answer is A , hope this helps.
For diets give the shogarie food away or have somone hide them from you and exercize do a small dailey workout
Answer:
Cross Sectional , Stratified Study
Explanation:
Research needed to gather primary data to compare attitudes towards energy brand between different ethnic groups : is Cross Sectional, Stratified Study .
Cross Sectional research is about studying various sample units at a particular point of time. Eg : Studying various ethnic groups at a point of time.
Stratified Study is based on sample drawn from various strata i.e sub population groups. It is a better representative sampling form, as encompasses all component groups of sample. Eg : Studying various subgroups (ethic groups) at a point of time.
