Global disease experts say little is known about China's experience with long-term COVID effects thought to have afflicted millions with debilitating fatigue, brain fog and other symptoms
WHO chief Tedros Adhanom Ghebreyesus said on Wednesday that high-income countries like the United States should hold off on giving more doses until more poor countries are able to inoculate their own populations.
But White House press secretary Jen Psaki said that was a "false choice" and Washington can both provide booster shots, if they are approved for use in the country, and donate excess supplies to other countries.