Multiple choice

Cold and flu are caused by

  1. bacteria

  2. fungi

  3. algae

  4. virus
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Common cold and influenza (flu) are both caused by viruses, specifically rhinoviruses and influenza viruses respectively. Bacteria cause different types of infections like strep throat or tuberculosis, fungi cause conditions like yeast infections, and algae are plant-like organisms not involved in human respiratory infections.

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