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Varicella (chickenpox) is an acute, highly contagious disease caused by varicella-zoster virus (VZV), a member of the herpesvirus family. Only one serotype of VZV is known, and humans are the only reservoir.
Aug 26, 2024 · Stigma linked to mpox can undermine public health efforts or prolong a disease outbreak, as people may be more reluctant to come forward and seek care and treatment. For mpox, stigma, discrimination and racism have been particularly directed against communities initially most affected by the disease, namely men who have sex with men, trans people and gender diverse communities.
The Immunization, Vaccines and Biologicals department is responsible for targeting vaccine-preventable diseases, guiding immunization research and establishing immunization policy.
Dec 8, 2022 · Chikungunya is a disease transmitted to humans by mosquitoes in Africa, Asia, and the Americas; sporadic outbreaks have been reported in other regions. Dengue and Zika have similar symptoms to chikungunya, making chikungunya easy to misdiagnose.
Jun 28, 2016 · Smallpox is an ancient disease caused by the variola virus. Early symptoms include high fever and fatigue. The virus then produces a characteristic rash, particularly on the face, arms and legs. The resulting spots become filled with clear fluid and later, pus, and then form a crust, which eventually dries up and falls off.
Sep 4, 2018 · Varicella-zoster virus (VZV) causes both varicella (chickenpox) by primary infection and herpes zoster (HZ or shingles) by endogenous reactivation from latency. VZV circulates worldwide. Acquisition of infection tends to be at a younger age in temperate countries (> 90% infected by adolescence in absence of vaccination programme), compared to an older distribution in tropical countries.
Dec 8, 2020 · When a person is susceptible and they encounter a harmful organism, it can lead to disease and death. The body has many ways of defending itself against pathogens (disease-causing organisms). Skin, mucus, and cilia (microscopic hairs that move debris away from the lungs) all work as physical barriers to prevent pathogens from entering the body in the first place.
Sep 26, 2024 · WHO fact sheet on vector-borne diseases, including key facts, overview, and WHO response. Vector-borne diseases are illnesses caused by pathogens and parasites in human populations. WHO works with partners to provide education and improve awareness so that people know how to protect themselves and their communities from mosquitoes, ticks, bugs, flies and other vectors.
Jun 21, 2016 · Smallpox is a disease which can be easily diagnosed by trained health workers without the need for laboratory support. During the eradication campaign, WHO produced training materials designed to help health staff recognize smallpox, distinguish it from chickenpox, and avoid common diagnostic errors. These materials are now electronically ...
Jul 12, 2024 · Measles is a highly contagious, serious airborne disease caused by a virus that can lead to severe complications and death. Measles vaccination averted 57 million deaths being between 2000 and 2022. Even though a safe and cost-effective vaccine is available, in 2022, there were an estimated 136 000 measles deaths globally, mostly among unvaccinated or under vaccinated children under the age of 5 years.