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.

The Organization of American States is an important forum for regional diplomacy and has become more assertive in promoting the rule of law, human rights, and fair elections as some states face domes…