Bill Gates, in a Twitter discussion Tuesday, said that the current COVID-19 vaccines were missing two key factors, and claimed that Omicron might bring about a wave of immunity in communities it passes through. Microsoft co-founder and one of the world’s richest men, Gates, has invested in vaccine research through his foundation and given prominent talks regarding the pandemic. Recently, he chatted regarding the current situation of COVID-19, vaccines, and related issues with Devi Sridhar, a professor at the University of Edinburgh where she holds a Personal Chair in Global Public Health. When asked about a breakthrough that could result in the biggest difference for ending the pandemic, he talked about the efficacy of vaccines. “The vaccines we have prevent severe disease and death very well but they are missing two key things. First they still allow infections (‘breakthrough’) and the duration appears to be limited. We need vaccines that …