Answer
b.
Work Step by Step
Option a. is incorrect. Vaccines have been designed that are effective against both bacteria and viruses.
Option c. is incorrect. Antiviral drugs are effective against viruses, not bacteria.
Option d. is incorrect. Aspirin is a pain reliever and fever reducer. It merely treats the symptoms of the infection but not the infection itself.
Option b. is correct. Antibiotics are effective against bacterial infections but are ineffective against viral infections.
