If catching the flu causes the body to produce antibodies , why do people continue to catch the flu? The influenza virus mutates. The influenza bacteria mutate. The virus lies dormant and can reactivate each year. A different type of bacteria causes the flu each year.

The correct answer is: The influenza virus mutates.<br /><br />Explanation: The influenza virus is known for its ability to mutate rapidly, which means that even if a person has developed antibodies to a specific strain of the virus, they may still be susceptible to new strains that have emerged. This is why people can continue to catch the flu despite having antibodies to previous strains of the virus. The other options provided are incorrect because the flu is caused by a virus, not bacteria, and the virus does not lie dormant and reactivate each year.