Why is the world still being hit by wave after wave of COVID-19 when we know how to stop it?

“To end this pandemic, high-income countries with a vaccine pipeline for adequate coverage of their populations should, alongside their own scale-ups, immediately commit to providing the 92 low- and middle-income countries of Gavi’s COVAX Advance Market Commitment with at least 1 billion vaccine doses by no later than September 2021, reaching more than 2 billion doses by mid-2022.”