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.

Tariffs have been applied over the years to protect homegrown industries and target competitors who are seen as using unfair trade practices. They impose costs on both importers and exporters and had been in decline until the recent U.S.-China trade war.

President Trump’s reversal of half-century-old U.S. policy will in practice change little in the strategic territory occupied by Israel, but it could have far-reaching diplomatic reverberations.