Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. WHO Says Vaccine Announcement Encouraging, More Data Needed VOA News Experts at the World Health Organization (WHO) say the news Monday of another COVID-19 vaccine candidate is encouraging but more information is needed and, as new virus cases surge around the world, it is no time to be complacent. At their regular COVID-19 news briefing in Geneva, WHO officials reacted to the news from U.S. pharmaceutical company Moderna that its vaccine candidate tested at better than 90% efficacy. WHO Chief Scientist Soumya Swaminathan said that level of efficacy in this vaccine, as well as the Phizer/BinNTech vaccine candidate announced last week, is very encouraging. .