Venipucture ( drawing blood ) and sub cutaneous or intramuscular injections ( shots like vaccinations ) are commonly thought by the public to "cause" fainting - but what really happens is that anxiety slows the heart rate down, the blood pressure falls, and then blood flow to the brain declines sharply, and the lights go out in the anxious victim. People should not receive injections or blood drawing while standing, but sitting comfortably on a horizontal examination table where they can lie down if they feel light headed, and attended during and after the procedure by another knowledgeable person.
The treatment is to get the fainted person horizontal, on the ground or a sofa, and elevate their legs higher than their heart - this will increase blood return to the heart from the great leg veins, and increase cardiac output to the individual's brain which is no longer 1.5 feet higher than their heart. Almost everyone wakes up promptly with this maneuver. I am always amazed how many folks - general public and some health care personnel do not seem aware of this. Fainting may be more common in young fit individuals, especially if their resting heart rate is very slow - say 45-55 or so. Preventing injuries from falling due to fainting should be obvious!
I used to see several folks every year who would faint when I began to measure their introcular pressure with the blue light tonometer at a slit lamp. Again, due to anxiety, not the procedure itself - Laying them down, and getting a assistant to raise their legs above their heart in a modest, sensitive manner promptly helped them recover. Folks in dresses should have a blanket placed over them before raising their legs for their modesty, and to prevent other misunderstandings - a female assistant can be helpful for this.
My wife and I were returning from a trip to South Africa years ago, and we were seated several rows apart on the airplane, at the end of along day in the field. My wife was found unconscious in her seat shortly after takeoff, and the stewardess was doing vigorous sternal rubs on her chest to awaken her without success, and yelling for Physicians on board, and discussing returning the airplane to the airport in South Africa. A cardiologist was examing her, but had not moved her. When I manged to climb back over several rows to her, I physically picked her up and laid her down on the floor in the aisle, and lifted her legs - within 20-30 seconds she was awake, and embarrassed to have distressed every one. I was quite relieved that she had not had a heart attack or stroke, but a simple vagal fainting episode contributed to by sitting immobile in a small airplane seat, a bit dehydrated, and her anxiety about flying ( which I knew very well ). We were able to continue the flight to Atlanta as planned, and I am sure the other 250 people on board were quite relieved as well.
I need to ask my veterinarian if they ever see animals faint from venipucture - I doubt they do.
I hesitate to mention that pharmaceutical firms cannot require anyone to get vaccinated - they do not and cannot make laws - elected legislatures however can, and do sometimes legislate the requirements for vaccination - like Rabies vaccination for dogs. Obviously it is good to protect ones canine friend, but it is also very important to protect the public from the rabies virus in an innocent harbor. I wonder if someone, who refuses vaccination, could be held legally liable if they then contract the preventable disease, and transmit it to someone else, just like if my dog became rabid due to my failing to get it vaccinated and then it bit someone. ( My dog is vaccinated for rabies annually or as suggested by my vet)
Herd immunity is also very important, and an under appreciated, benefit of modern life.
How society, and their elected law makers, balance the need for public safety versus individual choice and freedoms is complex, and can lead to high emotions by both sides of the pro vs con vaccination groups. These are complex issues, that don't lead themselves to simple decisions by reading a bit on google. But when the American Medical Assn or other medical professional and public health organisations make a recommendation, it should be given very serious consideration by the public and by lawmakers. When the public does not even understand fainting, it is hard to believe they will understand the many complexities of modern preventive medicine.
The successful elimination of smallpox is a miracle almost no one is even remembers these days - due largely to vaccination not giving the virus any safe harbor.