Why does this particular vaccine need to be administered again, even if you got a flu shot last year? It’s
because new strains of the virus are constantly appearing and evolving
, so the vaccine must change along with them.
Why must a new flu vaccine be made every year?
Why does this particular vaccine need to be administered again, even if you got a flu shot last year? It’s
because new strains of the virus are constantly appearing and evolving
, so the vaccine must change along with them.
Does the flu vaccine need to be approved every year?
So, every year,
there is a need for a new flu vaccine
. To that end, FDA, World Health Organization (WHO), CDC, and other partners collaborate by collecting and reviewing data on the circulating strains of influenza from around the world to identify those likely to cause the most illness in the upcoming flu season.
How good is the flu vaccine 2020?
Flu
vaccination can keep you from getting sick with flu
.
For example, during 2019-2020 flu vaccination prevented an estimated 7.5 million influenza illnesses, 3.7 million influenza-associated medical visits, 105,000 influenza-associated hospitalizations, and 6,300 influenza-associated deaths.
How many flu shots have been given this year?
193.8 million doses
of flu vaccine had been distributed in the United States as of February 26, 2021—the highest number of doses in a single flu season. CDC provided weekly updates on total flu vaccine doses distributed throughout the 2020-2021 flu season.
What are the disadvantages of the flu shot?
- soreness, swelling, and discoloration at the injection site.
- headache.
- fever.
- nausea.
- tiredness and muscle aches.
How long does the flu shot last 2020?
The flu shot offers protection against the flu for
about 6 months
. A person should get a flu shot every year, and the best time to get one is the end of October.
How long does flu shot last?
How long does immunity from influenza vaccine last? Protection from influenza vaccine is thought to persist for
at least 6 months
. Protection declines over time because of waning antibody levels and because of changes in circulating influenza viruses from year to year.
How effective is the flu shot for seniors?
The regular flu vaccine seems to be less effective in seniors than it is in younger adults. However, studies have found the high-dose senior flu shot
better protects older adults against the
flu when compared with the standard flu vaccine.
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.
What strains are in the 2020 2021 flu vaccine?
The committee recommended that the quadrivalent formulation of egg-based influenza vaccines for the U.S. 2021-2022 influenza season contain the following: an
A/Victoria/2570/2019 (H1N1) pdm09-like virus
; an A/Cambodia/e0826360/2020 (H3N2)-like virus; a B/Washington/02/2019- like virus (B/Victoria lineage);
What months are flu season?
In the United States, flu season occurs in
the fall and winter
. While influenza viruses circulate year-round, most of the time flu activity peaks between December and February, but activity can last as late as May.
Is the flu shot a live virus?
Flu vaccines given with a needle (i.e., flu shots) are made with either inactivated (killed) viruses, or with only a single protein from the flu virus. The
nasal spray vaccine contains live viruses that
are attenuated (weakened) so that they will not cause illness.
How many doses of influenza vaccine are required?
The vaccine is given in
1 or 2 doses
. Each dose is one squirt into each nostril. If your child is under 9 years of age and has received any flu vaccine before, they will only need 1 dose.
What is the difference between the senior flu shot and the regular flu shot?
In response to a regular flu shot, older people
produce 50% to 75% fewer antibodies
, which protect against the vaccine antigens, than do younger adults. Studies have found higher antibody levels in older adults who received high-dose flu vaccines than in those who received standard-dose flu vaccines.
When should a senior citizen get a flu shot?
The CDC recommends that everyone six months and older who isn’t contraindicated get an annual flu vaccination by the end of October when influenza activity typically begins increasing. For people over 65, getting the shot each year in
September or October
is especially important.
