This type of vaccine uses a live virus that has been weakened or altered in some way.

• Toxoid vaccine

• Attenuated vaccine

• mRNA vaccine

• Inactivated vaccine

The first vaccine that was developed was for

• chickenpox

• smallpox

• polio

• rubella

mRNA vaccines work by

• introducing inactivated virus into the body to start an immune response.

• having your own cells make a protein from the virus so your immune cells will recognize the virus.

• changing the DNA of your cells to protect you from infection from the virus.

• using a carrier virus to start an immune response.

The Pfizer and Moderna vaccines used to prevent coronavirus infections are ___________ vaccines that make __________________ from the virus.

• attenuated, proteins

• mRNA, DNA

• toxoid, toxins

• mRNA, spike protein

What are some advantages of the mRNA vaccine? Check ALL that apply.

• mRNA degrades quickly

• The vaccine does not make you sick.

• mRNA enters the host cell's nucleus.

• mRNA vaccines can be made quickly.

Sometimes vaccines need boosters to remain effective.

• True

• False

What is a possible outcome if the spike protein on the coronavirus mutated?

• The vaccine may no longer be effective.

• The vaccine may have reduced effectiveness.

• Both are true

Vaccines that introduce a small piece of the virus to the host are known as

• subunit vaccines

• viral vector vaccines

• mRNA vaccines

• inactivated vaccines

The Johnson & Johnson and Oxford/AstraZeneca vaccines use what kind of vaccine technology

• mRNA vaccines

• viral vector vaccines

• toxoid vaccines

• subunit vaccines