Scientists are testing the effectiveness of 3 different viral medicines (or vaccines) in protecting against the common cold. They sign up 1, 200 human volunteers and split them into three groups. So each group of 400 people is given one of the vaccines. The groups are studied for five years and the scientists record how many colds they get each year. What is the dependent variable in this investigation?

IMMUNE SYSTEM

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Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

A	different viral medications
B	the type of common cold virus
C	the number of years
D	the number of colds each year

Explanation:

Detailed explanation-1: -These vaccines were held to the same standards used to ensure the safety of any approved vaccine. Before a new vaccine is given to people, a lot of testing is done in a lab. Then, it’s tested in people in clinical trials to make sure it’s safe and effective.

Detailed explanation-2: -How do vaccines work? Vaccines stimulate the human body’s own protective immune responses so that, if a person is infected with a pathogen, the immune system can quickly prevent the infection from spreading within the body and causing disease.

Detailed explanation-3: -Polio and diphtheria are the two diseases which can be prevented by using vaccines.

Detailed explanation-4: -BACK. Diseases that Vaccines Prevent. Chickenpox (Varicella) Diphtheria. Flu (Influenza) Hepatitis A. Hepatitis B. Hib. HPV (Human Papillomavirus) More items

There is 1 question to complete.

ANATOMY

GENERAL ANATOMY

IMMUNE SYSTEM