Coronavirus disease (COVID-19) - World Health Organization (WHO)
Dec 5, 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 …
WHO prequalifies first maternal respiratory syncytial virus vaccine
On 12 March 2025, the World Health Organization (WHO) prequalified the first maternal respiratory syncytial virus (RSV) vaccine to protect infants against one of the most common causes of acute …
Chikungunya epidemiology update - June 2025
Jun 11, 2025 · Chikungunya virus (CHIKV) is a mosquito-borne virus primarily transmitted by Aedes mosquitoes. It causes acute illness characterized by fever, rash, and debilitating joint pain, with some …
Seasonal influenza - Global situation
Nov 30, 2025 · Seasonal influenza (‘the flu’) is an acute respiratory infection caused by influenza viruses that circulate globally and year-round. It can cause illness ranging from mild to severe, sometimes …
WHO Scientific advisory group issues report on origins of COVID-19
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 …
COVID-19 still causes severe disease, but up-to-date vaccines are ...
5 days ago · Moreover, the impact of the virus seems to still be as severe, and sometimes more severe, than influenza,” noted Dr Mark Katz, a medical epidemiologist with the Pandemic Threats, …
Nuevo coronavirus 2019 - World Health Organization (WHO)
En este sitio web se puede encontrar información y orientaciones de la OMS acerca del actual brote de enfermedad por coronavirus (COVID-19) que fue notificado por primera vez en Wuhan (China) el 31 …
Human metapneumovirus (hMPV) infection
Jan 10, 2025 · Human metapneumovirus (hMPV) is one of the viruses that causes the common cold (upper respiratory infection). It usually makes people only mildly sick, but it can make some people …
Marburg virus disease - World Health Organization (WHO)
Jan 20, 2025 · WHO fact sheet on Marburg haemorrhagic fever provides information on transmission, signs and symptoms, diagnosis, prevention and WHO response.
Coronavirus disease (COVID-19)
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.