Nov 27, 2025 · WHO fact sheet on COVID-19, including information on symptoms, transmission, treatment, prevention, vaccines and and WHO's work in this area.

Information on COVID-19, the infectious disease caused by the most recently discovered coronavirus.

Sep 29, 2025 · Coronavirus disease (COVID-19) is an infectious disease caused by the SARS-CoV-2 virus. Most people infected with the virus will experience mild to moderate respiratory illness and …

Oct 20, 2025 · WHO fact sheet about yellow fever, a mosquito-borne viral disease. Included are sections on symptoms, treatment, diagnosis, prevention and WHO's work in this area.

Apr 24, 2025 · The virus can get into the human population when people have close contact with the blood, secretions, organs or other bodily fluids of infected animals such as fruit bats, chimpanzees, …

Oct 3, 2025 · Chikungunya is a mosquito-borne viral disease caused by the CHIKV, an RNA virus in the alphavirus genus of the family Togaviridae. CHIKV is transmitted by infected female mosquitoes, …

Jun 27, 2025 · The WHO Scientific Advisory Group for the Origins of Novel Pathogens (SAGO), a panel of 27 independent, international, multidisciplinary experts, today published its report on the origins of …

Jul 23, 2025 · Hepatitis B is a viral infection that attacks the liver and can cause both acute and chronic disease. This fact sheet provides information about transmission, symptoms, diagnosis, treatment, …

Jul 15, 2025 · WHO fact sheet on HIV and AIDS with key facts and information on signs and symptoms, transmission, risk factors, testing and counselling, prevention, treatment and WHO response.

May 28, 2025 · Since mid-February 2025, according to data available from sentinel sites, global SARS-CoV-2 activity has been increasing, with the test positivity rate reaching 11%, levels that have not …