Vaccines are always to generate immunity from viruses that can cause severe long term health impacts (like polio) or death (like most of the diseases we have vaccines for). Some viruses, like the common cold and cold sores (a type of herpes), have little to no complications and death except for extreme circumstances (like if the person has AIDS). Thus, there is no health, economic, or societal need for a vaccine for the common cold.
I am not sure what you mean by the "original SARS virus", but there are vaccines for several of the coronavirus-related illnesses. In some cases, the vaccines are not mass produces or distributes as there are no breakouts. We don't take all vaccines that we have available. Smallpox, for example, has been eradicated except for very isolated cases.
The SARS-CoV-2 vaccine was created "so quickly" due to a massive international effort by thousands of scientists, companies, and countries across the world. There was tremendous worldwide effort and funding put into developing a vaccine. Under "normal" circumstances the vaccines take much longer as they are not supported by so many people or funding.
Is it at least 94% effective? According to testing, yes.
Is it like the flu vaccine? Yes and no. Yes, in the sense that the patient will not see much difference in the administration of the vaccine or its side effects. And no, it is not generated using the same biotechnology. In fact, there are several SARS-CoV-2 vaccines created using a number of methodologies that are in the final stages right now across the world.
Seems like you answered that pretty well . Its still very strange to me a vaccine was created in less than a year. And the “testing” will have to be trusted based on individuals themselves i dont think it should be mandated or forced upon people to take this vaccine but I believe we are headed that way. Id like for more “testing” to be done. I am pro vaccine as both my children have received every vaccine that has been available. And i was referring to the sars virus of 2002 when i said original sars virus. Apparently this version is much more contagious.
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