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March 28, 2024

Canada
What Is Canada’s Immigration Policy?

With its comparatively open and well-regulated immigration system, Canada remains a top destination for immigrants and refugees.

New Canadians wave the national flag during a citizenship ceremony in Toronto.

August 22, 2022

Infectious Diseases
Why Hasn’t the World Eradicated Polio?

The world is inching closer to eradicating polio, but armed conflicts and opposition to vaccines stand in the way of finally eliminating the disease.

A health worker marks the finger of a child with indelible ink during an anti-polio campaign at an Afghan refugee settlement on the outskirts of Islamabad, Pakistan.

July 1, 2020

Public Health Threats and Pandemics
What Is the Ebola Virus?

Endemic to the African tropics, the Ebola virus has killed thousands in recent years, putting the World Health Organization and major donor countries in the limelight as they’ve grappled with how to …

A health-care worker stands next to a cross during the funeral of a person suspected of dying of Ebola in Beni, Democratic Republic of Congo.

October 5, 2016

Sub-Saharan Africa
Can Malaria Be Eradicated?

A leading killer among diseases is now targeted for eradication by the middle of this century. Efforts to combat malaria are costly and challenging.

A child is given an injection as part of a malaria vaccine trial at a clinic in Kilifi, Kenya.

August 11, 2016

Americas
The Zika Virus

The Zika virus, which has been found to cause severe birth defects, has spread across the Americas, prompting the World Health Organization to declare a global health emergency.

Geovane Silva holds his son Gustavo Henrique, who has microcephaly, at the Oswaldo Cruz Hospital in Recife, Brazil.