World Health Organization

In 2025, the World Health Organization reported at least 40,000 people had been killed in the conflict in Sudan.

Seven laboratories, including the U.S. Centers for Disease Control and Prevention (CDC), serve as World Health Organization (WHO) collaborating centers for influenza and together analyze virus samples sent by National Influenza Centers in over 150 countries.

WHO convenes expert meetings in February and September each year to recommend which influenza strains should be included in vaccines for the Northern and Southern Hemisphere influenza seasons, respectively.

The World Health Organization reported in 2025 that fighting in Sudan had killed at least 40,000 people.

Chikungunya typically causes fever, joint pain, muscle pain, nausea, fatigue and rash; most people recover without medical attention within one to two weeks, but a minority can experience debilitating joint pain that persists for months or years and severe cases or deaths are rare and occur mainly in infants and elderly people with underlying conditions.

In 2025, the World Health Organization reported that more than 40,000 people wounded in Gaza had life-altering injuries.

A 2025 World Health Organization report found that nearly 40% of antibiotics used to treat common urinary, gastrointestinal, bloodstream, and sexually transmitted infections had lost effectiveness between 2020 and 2025.

A 2025 World Health Organization report estimated that antimicrobial resistance was directly responsible for about 1.2 million deaths per year and contributed to nearly 5 million deaths per year.

World Health Organization estimates that Salmonella enterica serovar Paratyphi (S. Paratyphi) causes approximately 3 million to 5 million cases of paratyphoid fever worldwide each year.

The World Health Organization determined, using data from more than 100 countries collected between 2016 and 2023, that resistance to antibiotics rose in approximately 40% of bacterial infection samples.

The World Health Organization reported that approximately one in six bacterial infections are resistant to antibiotics.

A World Health Organization analysis of data up to 2023 found that in 2023 one in six laboratory-confirmed bacterial infections worldwide were resistant to antibiotic treatments.

A World Health Organization report analyzing data up to 2023 found that, over the five-year period leading up to 2023, antibiotic resistance increased in over 40% of monitored antibiotics with an average annual rise between 5% and 15%.

A World Health Organization analysis of 2023 surveillance data found that resistance to commonly used antibiotics for urinary tract infections exceeded 30% globally.

In 2023, roughly 1 in 6 infections tested by laboratories worldwide were resistant to antibiotic treatment, according to the World Health Organization.

The World Health Organization reports that global adult obesity prevalence has more than doubled since 1990.

The World Health Organization has urged caution regarding claims that acetaminophen use is linked to autism, stating that several studies have found no such relationship.

The World Health Organization states that long-term lead exposure in adults can increase the risk of high blood pressure, cardiovascular problems, and kidney damage.

The World Health Organization reports that about 3.5 billion people worldwide suffer from gum disease or cavities.

The World Health Organization monitors and verifies attacks on health care facilities and reports casualty figures resulting from such attacks in conflict-affected areas.

Humanitarian reporting indicates that the conflict in Sudan has produced very large humanitarian needs, with at least 40,000 reported deaths and roughly 12 million people displaced.