These symptoms are the body's normal immune response to the inactivated virus in the vaccine. If experienced at all, these effects — which are much less severe than actual influenza — usually last for only one or two days after vaccination. So, although you may feel sick, you don't have the flu. via
What are the signs of an allergic reaction to the flu shot?
Signs of a severe allergic reaction can include:
How long are you contagious after a flu shot?
The flu shot is made from an inactivated virus that can't transmit infection. So, people who get sick after receiving a flu vaccination were going to get sick anyway. It takes a week or two to get protection from the vaccine. via
How long does fatigue last after flu shot?
Also, headache, fatigue and soreness are common side effects that can last up to three days. Rarely, people with certain allergies can go into anaphylaxis after the flu shot. “It's very rare but, sometimes, you can have a very serious reaction. via
What do you do if your allergic to the flu shot?
Can you have a delayed reaction to a flu shot?
Delayed-type reactions occur commonly within hours or days after exposure, although symptom onset can be delayed up to 2 to 3 weeks. via
Is it OK to be around a baby after a flu shot?
Anyone who needs the whooping cough or flu vaccines should get them at least two weeks before meeting the baby because it takes about two weeks to develop antibodies after vaccination. When one member of a household has a respiratory illness, other members are at risk for getting ill, too. via
Does getting the flu make your immune system stronger?
Getting the flu itself can provide much stronger immunity than any flu shot does. But getting the flu is dangerous, so getting a flu shot is a better option. via
Can you transmit flu even after vaccination?
It is possible to get the flu even if you receive a dose of flu vaccine. Flu vaccination reduces the risk of flu illness between 40% and 60%. Sometimes people are already exposed to flu virus before getting a flu shot. It may take a couple of weeks for a dose of flu vaccine to protect against the virus. via
Why am I so tired after the flu shot?
What Are the Possible Side Effects? Most people have no problems from the vaccine. If you get the flu shot, you might have a mild fever and feel tired or achy afterward. Some people also have soreness, redness, or swelling where they got their shot. via
Is it normal to have a lump after flu shot?
The most common side effect following vaccination is a sore arm. If you use your arm normally after vaccination, it will help ease the soreness more quickly. In some people, vaccines may cause a lump or hardness at the injection site which persists for a few weeks. via