in wide use: WHO Johnson & Johnson COVID-19 Vaccine Produces Strong Immune Response In Early Trial
CNN: The global death toll from COVID-19 could double to two million before a successful vaccine is widely available and that number could be even higher without concerted action to curb the pandemic, an official at the World Health Organization said on Friday.
 “Unless we do it all, (two million deaths) … is not only imaginable, but sadly very likely,” Mike Ryan, head of the UN agency’s emergencies program, told a briefing on Friday.
 A single dose of Johnson & Johnson’s experimental COVID-19 vaccine produced a strong immune response against the novel coronavirus in an early-to-mid stage clinical trial, according to interim results published on Friday. The vaccine, called Ad26.COV2.S, was equally well-tolerated at two different doses, the results showed. A single shot, versus a rival two-dose approach being tested by Moderna Inc and Pfizer Inc , could simplify distribution of the vaccine.
 However, it is unclear whether elderly people, one of the populations most at risk from the virus, will be protected to the same degree as younger people with the J&J vaccine.