Question

which two respiratory infections are caused by viruses?
tuberculosis and influenza
influenza and the common cold
the common cold and strep throat
strep throat and influenza

Explanation:

• Tuberculosis: Caused by the bacterium Mycobacterium tuberculosis, not a virus.
• Influenza: Caused by the influenza virus.
• Common cold: Usually caused by viruses (e.g., rhinoviruses).
• Strep throat: Caused by the bacterium Streptococcus pyogenes, not a virus.

Answer:

Influenza and the common cold.