The flu shot does not give you the flu. From what I have been taught working in medical facilities, almost all vaccines are made from inactive viruses. For people who choose to get a flu vaccine “without a needle” ( intranasal)—this is made with an active virus and can potentially make you sick.
It is always your choice of course, to take a vaccine. During flu season, if an employee refuses the flu vaccine they have to wear a mask when they have patient contact— for their own protection and protection of our patients with compromised immune systems. Shingles, of course, is different. You can’t “catch” shingles, the virus is lying dormant within you, which is why even if you are anti-vaccine, this is one that you might want to consider taking.