How long are COVID-19 vaccines effective?
How long are COVID-19 vaccines effective? (Credit: Unsplash) This article is brought to you thanks to the collaboration of The European Sting with the World Economic Forum. Author: John Letzing, Digital Editor, Strategic Intelligence, World Economic Forum Experts don’t know yet how long COVID-19 vaccines will be effective. Studies of two of the most prominent COVID-19 vaccines suggest they remain effective for at least six months. The CEO of one vaccine maker said immunity may start to fade within a year. One of the most pressing questions about COVID-19 vaccines is how long they can pr...