A 23-year-old man with one male sex partner presents to his primary care provider and reports that his partner was diagnosed with hepatitis A virus (HAV) infection 2 days ago. His last sexual contact with his partner was 8 days ago, and he denies any symptoms. He has not been vaccinated for hepatitis A. His medical history is significant for asthma and eczema. Which on of the following is the recommended hepatitis A virus postexposure prophylaxis for this 23-year-old man? Administer a single dose of monovalent hepatitis A vaccine now and give a second dose 6 to 18 months later Administer hepatitis A immune globulin 0.02 mL/kg in a single dose now Administer hepatitis A immune globulin 0.02 mL/kg in a single dose now and repeat in 4 weeks No postexposure prophylaxis is recommended since more than 72 hours have elapsed since the last sexual contact with the individual diagnosed with acute hepatitis A