Focus on vaccine supply

Pace has increased but supply constraints remain

The United States administration has announced that all Americans who have received a two-shot vaccine will be eligible for a free booster shot eight months after their previous injection. The administration claims that vaccines become less effective over time — although the evidence it relies on reveals that there are no major increases in death from Covid-19 for those vaccinated with two doses. The US decision flies in the face of recommendations from the World Health Organization (WHO) that rich countries should not start recommending additional shots of the vaccine immediately in order to ensure that vaccine supply reaches developing