I'm absolutely clueless but very intrigued about how vaccines are made. I have read up about it but cannot quite get my head around the real differences between the Pfizer and Oxford vaccine? I know one uses a genetic code of the virus and the other a weakened and genetically modified version of a cold virus found in chimpanzees, but what does that mean when it comes to the efficacy and the way the body builds immunity to covid?
Can someone here dumb it down for me so I can understand?