US Officials Seek To Know If Third Dose Helps Some

Washington (AP) Federal health officials have signalled they’re hunting ways to quickly learn if a third COVID-19 vaccine dose might better protect organ transplant recipients and other patients with weak immune systems. While the vaccines are strongly effective in most people, many Americans with immune-suppressing health problems remain in limbo after immunisation, uncertain how protected they really are. France and Israel already have begun offering an extra dose to transplant recipients and other immunocompromised people. In the US, those patients increasingly are pushing for — even lying to get — another shot, too..