Here is some information taken from the Centers for Disease Control and Prevention website:
How effective is the flu vaccine?
CDC conducts studies each year to determine how well the influenza (flu) vaccine protects against flu illness. While vaccine effectiveness (VE) can vary, recent studies show that flu vaccination reduces the risk of flu illness by between 40% and 60% among the overall population during seasons when most circulating flu viruses are well-matched to the flu vaccine. In general, current flu vaccines tend to work better against influenza B and influenza A(H1N1) viruses and offer lower protection against influenza A(H3N2) viruses. See “Does flu vaccine effectiveness vary by type or subtype?” and “Why is flu vaccine typically less effective against influenza A H3N2 viruses?” for more information.
I hear all kinds of talk on TV about how the US must stay under lockdown until a vaccine is found and that other solutions do not have a 100% guarantee. COVID-19 is a type of flu. CDC says that the vaccine for the common flu is only 40% to 60% effective anyways. Unlike the polio vaccine, which is nearly 100% effective.
The best avenue that I see is to find people who have the correct antibodies. These antibodies can be transferred to a patient via blood transfusion – and the patient is healed. The problem with the flu is that it mutates; thus, even if you get the vaccine, you may have a mutated version of the virus. I figure that the same could happen with a transfusion, but at least we do not have to wait for a vaccine that quite literally may never be found.
Unfortunately, the best solution appears to be a natural one. Let the virus play out until enough immunity (antibodies) is in the society so that the virus has nowhere to go. I know that sounds bleak and harsh, but life has no guarantees. Read more here: http://www.cdc.gov/flu/vaccines-work/vaccineeffect.htm