CFA #5 Warm Up

Olivia, Benjamin, and Henry were discussing about common cold. Olivia mentioned that even after recovering from a cold, it's possible to catch another one. Which explanation supports Olivia's statement?

• A cold is a viral infection with many different strains, so you can catch a different strain.

• A cold is a bacterial infection that remains active in the body, so it can flare up again.

• A cold is a bacterial infection present only during the winter months, so you can catch it again next winter.

• A cold is a viral infection that remains active until treated with antibiotics, so if you don't take antibiotics, you can catch it again.

In 1918, an outbreak of influenza infected 500,000 people all over the world. Tens of millions of those infected died. In 1994, an outbreak of pneumonic plague spread quickly through the city of Surat in India, killing 52 people. Which statement BEST describes the two events?

• Both outbreaks were pandemics.

• Both outbreaks were epidemics.

• The influenza outbreak was a pandemic. The plague outbreak was an epidemic.

• The influenza outbreak was an epidemic. The plague outbreak was a pandemic.

Which is the best explanation for why there is a continued need to develop new antibiotics to fight bacterial infections?

• Bacteria learn to avoid antibiotics that have been used for years.

• Bacteria are constantly mutating and developing resistance to antibiotics.

• Doctors need many drug options to treat many different patients with different characteristics.

THE BEST EXPLANATION OF HOW PASTURIZATION WORKS IS

• The food particles are better mixed after heating.

• Heat killed microorganisms that could cause spoiling.

Which best explains how a nonliving virus is able to reproduce?

• A virus infects a host organism by invading its DNA into the cells of the host organism.

• A virus infects a host organism by ingesting the DNA from the cells of the host organism into the virus.

• A virus becomes living when a sufficient number of viruses invade a host organism and cause an infection.

Which aspect of modern life could MOST likely cause an epidemic to turn into a pandemic?

• Vaccination

• Transportation

Which best explains a global outbreak that has a vaccine in development?

• It is a pandemic caused by a virus.

• It is an epidemic caused by a virus.

• It is a pandemic caused by a bacteria.