I'm wondering if they were already putting things

Bill Gates told us a few years back. According to Bill: "For every disease that we don't have vaccines, we will try mRNA". And that doesn't have to be a vaccine. Could be anything: "We just need to mess around. There's a lot of lipid nanoparticles, and some are very self-assembling.".

For those that still prefer vaccines, "We'll be able to build factories worldwide that can make $2 vaccines with even less lead time than we've had to have here during this pandemic.".