Immunization, Vaccines and Biologicals

Effective outbreak response reduces the risk of measles spread in the Pacific

A clinical team attends to a patient during the emergency simulation training (SOLMAT).

In 2019, the Pacific saw the re-emergence of measles, with outbreaks declared in Samoa, Tonga, Fiji and American Samoa, and cases reported in Kiribati. For Samoa, the country experienced a widescale measles outbreak which had significant impact upon the country’s population and health system. The disease has cost lives, with infants and young children being most affected.

Urgent health challenges for the next decade

Ambulances and a health-care worker in Syria

As a new year and a new decade kick off, WHO is releasing a list of urgent, global health challenges. This list, developed with input from our experts around the world, reflects a deep concern that leaders are failing to invest enough resources in core health priorities and systems.This puts lives, livelihoods and economies in jeopardy. None of these issues are simple to address, but they are within reach. Public health is ultimately a political choice.

Deaths from Democratic Republic of the Congo measles outbreak top 6000

A young girl in the DRC receives a vaccination via injection

With the death toll from the world’s worst measles epidemic in the Democratic Republic of the Congo (DRC) surpassing 6000, the World Health Organization (WHO) is calling for more funding to stop the outbreak.

Under the leadership of the DRC Ministry of Health, WHO, Gavi, the Vaccine Alliance, and other partner aid agencies vaccinated more than 18 million children under five across the country in 2019.

Updates on Typhoid Conjugate Vaccine for Control of Typhoid Fever

A young Indian girl is given a vaccine by injection
WHO/Adwoa Bentsi-Enchill

Pakistan became the first country to add typhoid conjugate vaccine in its routine immunization schedule with support from Gavi, the Vaccine Alliance, starting with a catch-up campaign in Sindh Province launched on 15 November 2019. More than 9 million children aged 9 months to 15 years have been vaccinated in the campaign.

In the first published results of efficacy for a licensed TCV in an endemic population, a single dose of TCV in children aged 9 months to 16 years in Nepal protected >80% of children against blood-culture confirmed typhoid fever after 1 year of follow up.

Communication products

Key resources and other documentation pertinent to our immunization work

Fact sheets

Fact sheets with the latest information on vaccines and immunization

Immunization highlights

A selection of key immunization achievements


Feature stories, videos and photos on vaccines and immunization

News archive

Immunization newsroom stories featured over the last five years

News materials

All news releases, statements and notes for the media on immunization

Questions & Answers

A list of questions and answers on vaccine-preventable diseases