Q would leave breadcrumbs, because he needed to be as vague as possible to sound like he knew what was going to happen, right? The people who would interpret those breadcrumbs were called bakers. Yes, I know breadcrumbs are from bread that's already been baked, but that's what they decided to call themselves to create an Us vs Them feel. So the "bread" in this image means there are things to be interpreted or reinterpreted yet.
seaweedsheep
Your friend is an idiot. MRNA vaccines are not new. Scientists have been working on a vaccine since SARS, which is similar to COVID (aka SARS-CoV-2). One of the reasons why medication can take so long to reach the public is that it takes money, which likely come from grants, which take time and have limited amounts to go around. When the pandemic broke out, countries around the world threw money at these labs. Everything else pretty much stopped, so they didn't have to wait for an understaffed and underfunded FDA to approve it.
Getting the vaccine is much better than slowly suffocating because the virus destroyed your lungs. Herd immunity only works when enough people have been vaccinated and clearly we haven't reached that yet since people are still getting infected, reinfected and dying.
Hbomberguy made a video about it. There's no nuance or foreshadowing in that Sherlock. He exists just so Moffat can feel smart that he knows something the audience can't possibly know yet, nor does he give them a chance to figure it out.