hepatitis a virus (hav) is spread primarily through which route? a) respiratory b) bloodborne c) droplet d) fecal-oral 2. most young children infected with hepatitis a do not have symptoms of infection. a) true b) false 3. which symptom occurs in more than 70% of older children and adults infected with hepatitis a? a) anorexia b) malaise c) jaundice d) nausea 4. hepatitis a infection can be diagnosed based solely on its unique clinical symptoms.