Why Scientists Are Puzzled By This Virus

Scientists have recently discovered that many viruses in the human body are not harmful. What is one beneficial role these viruses can play?

• Causing allergic reactions

• Protecting against disease

• Making you sneeze

• Killing human cells

The human body is described as a living ecosystem. Approximately how many bacteria are estimated to live in the human body?

• Thousands

• Millions

• Billions

• 40 Trillion

What is one way that the bacteria living in your body help you?

• They break down your meals.

• They cause inflammation.

• They invade your tissues.

• They prevent vitamin synthesis.

What is the main way that bacteriophages help maintain balance in the human body's ecosystem?

• By infecting human cells

• By killing bacteria

• By producing harmful toxins

• By increasing bacterial growth

What are common symptoms of a cholera infection?

• Fever and muscle aches

• Explosive diarrhea and vomiting

• Skin rash and joint pain

• Cough and sore throat

What is the main role of Staphylococcus aureus bacteria when it lives harmlessly on your body?

• It helps digest food in your stomach.

• It produces vitamins for your body.

• It takes up space, making it harder for harmful bacteria to grow.

• It strengthens your immune system directly.

How does the phage φSa3ms make Staphylococcus aureus bacteria more dangerous?

• It makes the bacteria grow faster.

• It gives the bacteria new genes that produce harmful toxins and allow deeper penetration.

• It makes the bacteria resistant to antibiotics.

• It causes the bacteria to change color, making them harder to detect.

How do oncolytic viruses help fight cancer?

• They make cancer cells stronger so they can fight other diseases.

• They directly attack and destroy healthy cells, which then fight cancer.

• They infect cancer cells, turn them into virus factories, and attract immune cells to the tumor.

• They prevent cancer cells from multiplying by blocking their food supply.