HHS cites real-world data for Covid-19 boosters; WHO says the science is still out

HHS cites real-world data for Covid-19 boosters; WHO says the science is still out

Source: 
MedCity News
snippet: 

In announcing plans to offer Covid-19 booster shots, federal health officials cited declining vaccine efficacy shown by real-world studies. But the World Health Organization said the science is less than clear about booster shots, adding that it’s ethically wrong to give third shots when so many around the world are waiting for their first one.