Flu vaccines are easily made. New ones are made every year. There is a base knowledge already in existence of what is needed. It's just modified to fit the needs of the specific strain.
This is totally different.
We have no baseline vaccine for ANY coronavirus to modify.
The difference can be seen in what type of coronavirus vaccines are being pushed and heralded as "having early signs that it's safe and may even be effective in prevention". (Note they slip in that they don't have evidence yet that it prevents someone from getting infected.) What methods are they using? In one of the leading vaccines they are using unproven, cutting-edge technologies that have no record of safety behind them, namely gene-editing. The only other vaccine in history to use this was the Ebola vaccine they just made a couple of years ago, and it wasn't as major of an technique in the development. (Not that it wasn't careless, but that's another story.) It's interesting that the same techniques of gene-editing were condemned for use in humans as reckless due to it's unknown long-term affects. A Chinese scientist was jailed for 3 years for editing genes in babies. Additionally, the world has largely embraced non-GMO food and showed a preference in non-GMO eating with their purchasing power after decades of being told that genetically modified food would be the solution to mankind's food chain problems. What is GMO? Genetically modified organism. Their use in crops was promised to reduce pesticide use, increase crop yields, and provide the same nutritional value. Instead more pesticides are needed, they have led to the rise of "superweeds" that do not die when sprayed with herbicides (genetic mutation driven by it's growth in dirt containing decaying plant matter of modified crops), large numbers of people who grew up eating them have developed allergies or intolerances to these foods, and the nutritional value is often much lower including the amount of vital nutrients, minerals, and vitamins they contain.
This technology, with all it's issues and questions, is being used to modify a monkey virus similar to the common cold that infects your cells and recodes them to produce the equivalent of the outer ring of the coronavirus. The purpose is for your body to recognize the corona of the coronavirus and attack it. They use a chimpanzee virus because the hope is you have never been infected by a chimpanzee virus. If you were, your immune system would fight it off before it got to infect your cells and the benefits would be zero. However, if you haven't, the scientists give it a "fair shot" (I thought a vaccine was supposed to be more effective than a coin flip...but maybe that's just me.) to infect your cells and do what they want it to do. However, to make it "safe" they have "turned off" a gene that doesn't allow the virus to grow and spread. If it were allowed to, this could be just another pandemic waiting to happen. Of course, viruses mutate all the time. So, who's to say the virus doesn't mutate and turn the gene back on or something equally/more dangerous? Let's not think about that...let's just inject this virus into the host and allow the patient to develop an immune response and build antibodies. What could go wrong? We love putting genetically modified organisms in our body, right?
A vaccine usually takes years to make.
the1a.org