WEF: This Vaccine Is Effective Against All 20 Known Strains Of Flu Scientists have developed a universal flu vaccine. It’s effective against all 20 known strains of flu and could help us fight off dangerous new strains before they develop into a pandemic. The new vaccine could be in use within 2 years. 🔗 SOURCE: https://www.weforum.org/videos/this-vaccine-is-effective-against-all-20-known-strains-of-flu