RE: Marsden confident...todays Express17 Oct 2020 12:30
Well I was pointing out there are many corona viruses some of which cause infection in humans. eg in 4 main sub groups, the alpha, beta , gamma and delta. Examples are 229E, NL63, OC43 amd HKU1 then there are the MERS series and SARS. Many of these have had vaccines being researched a long time. But also there was a base to build on for thos who followed a particular route