__________________ are used to treat most bacterial infections.

Transmission of a communicable disease by a vector is an example of _________________.

Transmitting an infection to an unborn baby is an example of _______________.

_________ is the single most effective way to prevent the spread of disease.

You experience the _____________ when the area around an injury becomes hot, swollen, red, and painful.

__________ are the part of the body’s first line of defense.

The state of being protected against a particular disease is ____________.

_____________ are found on the surface of pathogens.

Some T cells and B cells become __________ and give your body long-term protection against many diseases.

Influenza infection can lead to ________________.

______________ may be used to treat strep throat and tuberculosis.

Chemicals, including drugs or alcohol or sharing needles can cause _______________.

The most chronic blood-borne infection in the United States is _____________.

The evidence of ___________ in humans has increased with the past two decades, which makes it an emerging infection.

A protein that acts against a specific antigen is a plasma cell.

The respiratory system is a network of cells, tissues, organs, and chemicals that fights off pathogens.

Airborne transmission is different from direct contact because the pathogens don’t settle quickly on surfaces.

Skin and mucous membranes are examples of physical barriers of the immune system, while tears are an example of a chemical barrier.

Emerging infections are diseases that have increased in humans in the past two decades or threaten to increase in the near future.