This chapter provides details of the viruses and other organisms that are more severe in immunocompromised patients (HIV, CMV, EBV, HSV, VZV, HHV6, HHV7, HHV8, adenoviruses, influenzaviruses, parainfluenzaviruses, RSV, SARS-CoV-2, HBV, HEV, polyomaviruses, papillomaviruses, parvovirus, T gondii). It gives details of symptoms, diagnosis, treatment and strategies for reducing the risk of severe symptoms.

This chapter details the epidemiology, route of spread, prevalence, incubation period and at-risk groups relating to influenza viruses. It gives information on symptoms, laboratory diagnosis, treatment, prophylaxis and infection control.

This chapter provides information on viral zoonotic infections in humans, transmitted from animals, caused by rabiesvirus, influenzaviruses, HEV, poxviruses, hantavirus, Lassa fever virus, ebola, SARS-CoV, MERS-CoV, SARS-CoV-2, nipahvirus, zikavirus. It details which animal hosts are associated with which viruses, modes of spread and strategies for control.

This chapter provides details of the different kinds of vaccines available (live, attenuated, killed, inactivated, recombinant, subunit, mRNA, DNA and vector) for virus infections (e.g. SARS-CoV-2, HAV, HBV, influenzaviruses, JEE, measlesvirus, mumpsvirus, rubellavirus, HPV, rabies, polio, rotavirus, smallpox, mpox, yellow fever virus) in humans. It details the routes of administration and usage (e.g. pre-exposure or post-exposure, childhood, occupational health, travel and for at-risk groups).

This chapter details the eye diseases (conjunctivitis, keratitis, retinitis and scleritis) caused by viruses and other organisms (adenoviruses, enteroviruses, HSV, measlesvirus, influenzaviruses, VZV, CMV, Toxoplasma gondii, molluscum contagiosum, papillomaviruses and HHV8). It details symptoms, epidemiology, diagnosis and treatment.