WHO: To focus on boosters when more than half the world lacks vaccine doses is short-sighted and will only keep the pandemic burning longer.
The World Health Organization (WHO) has called for a moratorium on COVID-19 boosters until the end of next month, with the aim of ensuring that at least 10% of people in all countries are vaccinated before extra doses are handed out. It makes a compelling argument. As Nature went to press, 58% of people in high-income countries had received at least one vaccine dose; in low-income countries this number stood at just 1.3%.
Moreover, the case for boosters has not yet been proved. Most COVID-19 vaccines currently in use remain extremely effective months after administration, particularly against severe disease and death. In a period of vaccine scarcity, the choice to dole out boosters must be guided by evidence of benefit, and consideration given to the cost of delaying the delivery of vaccines to vulnerable people and health-care workers in other countries. So far, there is little evidence that boosters are needed to protect the fully vaccinated.
Moreover, the case for boosters has not yet been proved. Most COVID-19 vaccines currently in use remain extremely effective months after administration, particularly against severe disease and death. In a period of vaccine scarcity, the choice to dole out boosters must be guided by evidence of benefit, and consideration given to the cost of delaying the delivery of vaccines to vulnerable people and health-care workers in other countries. So far, there is little evidence that boosters are needed to protect the fully vaccinated.