Amid a global COVID-19 surge fueled by the highly transmissible Delta (B1617.2) variant, the World Health Organization (WHO) today called for a moratorium on booster vaccine doses to allow the global supply to fill gaps in lower-income countries.The global total is now within striking distance of 200 million cases, with surges in Asia and the Middle East making up much of the latest weekly increase.Moratorium call highlights lower-income country needAt a media briefing today, WHO Director-General Tedros Adhanom Ghebreyesus, PhD, said that it's unacceptable that countries that have already used most of the vaccine supply will be using even more of it.