It's a misnomer to say that all of the injections to prevent COVID are vaccines. The mRNA injections are not technically vaccines as they don't work like vaccines work. These have NEVER been tested long-term, so we have NO idea of side effects 10, 20, 30... years down the road. Scientists don't even know yet how long the immunity from these injections will last.
Edit: Here's something else to keep in mind. It may well be that by the time these vaccines and mRNA injections are made available to the general public, most people will already have immunity through exposure to the virus (herd immunity). So...if this is the case, Big Pharma can claim that their vaccines stopped the spread, but this will not be the truth.
Herd immunity is not possible.
Also immunity from infection and disease by previously having the virus is only about a 30% chance because of the nature of this virus. That's why the repeated cases keep popping up. Your immune system doesn't get triggered the same by this virus while your immune system is getting infected by it.
Thus you can get repeatedly infected until a cytokine storm kills you or severely injured you.
And with all the domestic animals that will carry the virus...you stand no chance of not catching it again. Herd immunity is impossible.
Mrna Vaccines haven't been tested in humans for 20 years...but other animals (chimpanzee and mice) it has been...that's why they feel that it would be beneficial... because it shortens time required to make this vaccine work. And considering how much and fast people's RNA changes it is considered to be fairly harmless...the T-cells and b-cells recording the information for long term efficacy is highly encouraging.
And there's over 250,000 people who have been used for testing with only normal vaccine side effects. (Feel like dirt for a day or two and sore injection site)
The real risk is the Pfizer vaccine which needs such cold temperatures for shipping and storage. Meaning that it's less stable than Moderna's vaccine. The instability could lead to a number of various problems. It not only could be ineffectual but possibly damaging by breaking down into various compounds if stored improperly. There's the real risk. People who don't do everything very carefully.
Like I've said...
It's a great vaccine but there's reason to be careful and cautious. Protocols at a walgreens might be better than a hospital or vice versa.