Final answer:
The correct statement about hepatitis A is that it is caused by the hepatitis A virus. It is mostly transmitted through fecal-oral routes, not just through blood, and there is a vaccine available that provides protection against it.
Step-by-step explanation:
Which of the following statements regarding hepatitis A is correct? The accurate answer is: It is caused by the hepatitis A virus. Hepatitis A is usually transmitted through the fecal-oral route, from close personal contact, or by consuming contaminated water or food. Contrary to some misconceptions, it cannot only be transmitted through blood; thus, the statement that it can only be transmitted through blood is incorrect. Vaccination does provide protection against it, making the claim that vaccination provides no protection incorrect as well. Finally, while hepatitis affects the liver, it primarily affects the liver and not the nervous system, thus, excluding the statement that it primarily affects the nervous system as correct.