The United States is witnessing another year of record gun violence, raising domestic and international scrutiny of its comparatively loose gun laws and placing pressure on lawmakers to enact meaning…

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

The swift development of effective vaccines against COVID-19 was an unprecedented scientific achievement. But production challenges, vaccine nationalism, and new variants have all presented hurdles.