A viral infection is an illness caused by a virus. Viruses are tiny infectious agents that can only replicate inside the cells of a host organism. When a virus enters the body, it can multiply and cause an infection.
Introduction Japanese encephalitis (JE) is a severe, vector-borne viral encephalitis disease that can be found all over the world but is most prevalent in Asia, the Western Pacific, and northern Australia. Based on incidence and severity, the Japanese encephalitis virus (JEV), a flavivirus spread by mosquitoes, is the main cause of viral encephalitis in Asia. … Read more
Introduction Ebola virus disease (EVD) is a serious illness caused by the Ebola virus, belonging to the family of viruses known as Filoviridae that affects both humans and other primates. The Ebola virus is a non-segmented, linear, single-negative-stranded RNA virus. Ebola is a virus that damages tissue throughout the body and causes severe inflammation. A … Read more
Introduction Rabies is a preventable viral zoonotic illness caused by the bite of rabid animals. The rabies virus is a single-stranded, negative-sense RNA virus belonging to the family Rhabdoviridae and the genus Lyssavirus. Incidence Incubation Period Types of Rabies Furious or encephalitic rabies Paralytic rabies Causes of Rabies Risk Factors of Rabies Factors that can … Read more
Introduction Mumps is a contagious viral infection caused by the Mumps virus, a single-stranded, linear, negative-sense RNA virus belonging to the Paramyxoviridae family and subfamily Rubulavirinae. During illness, the virus first infects the upper respiratory tract. From there, it spreads to the salivary glands and lymph nodes. The virus spreads throughout the body when it … Read more
Introduction Measles (Rubeola) is a highly contagious viral respiratory illness caused by the measles virus, the single-stranded, linear, negative-sense RNA virus, that belongs to the family Paramyxoviridae, a member of the genus Morbillivirus. It is an acute febrile viral illness that can be prevented and causes rashes all over the body. It can be transmitted … Read more
Introduction Influenza (Flu) is a severe, extremely contagious viral respiratory infection that is mostly brought on by the influenza virus. Influenza viruses are members of the Orthomyxoviridae RNA virus family and are divided into influenza A, B, C and D based on their main antigenic distinctions. A wide range of animal species, in addition to … Read more
Introduction Herpes zoster (HZ), popularly known as shingles, is an infectious disease caused by the varicella-zoster virus (VZV), a ubiquitous DNA virus that belongs to the family of human herpes viruses. VZV is a virus that also causes chickenpox. The chickenpox virus lies dormant (inactive) after the resolution of chickenpox in the ganglia of the … Read more
Introduction Chickenpox is a highly contagious disease caused by the Varicella-zoster virus (VZV). VZV is a Herpesviridae-family, linear, double-stranded DNA virus. These viruses spread through aerosolized respiratory droplets or contact with infected skin lesions and infect many tissues during primary infection before becoming dormant. They can reactivate later to cause disease. Incidence Incubation period Causes … Read more
Introduction Hepatitis C is a contagious liver disease that results from infection with the hepatitis C virus (HCV). HCV is a hepatotropic RNA virus that belongs to the family Flaviviridae. HCV causes progressive liver damage, which might result in liver cirrhosis and hepatocellular carcinoma. Types of Hepatitis C Acute Hepatitis C Chronic Hepatitis C Incidence … Read more
Introduction Hepatitis A is a highly contagious, short-term liver illness caused by the hepatitis A virus (HAV), a member of the Picornaviridae family of viruses with a single standard RNA and no envelope. Although it affects people everywhere, impoverished countries are where it is most common. The virus is frequently found in high amounts in … Read more