Contrary to popular belief, you should not wait until November or December to get your flu shot. Experts say it is time now.
"Since the flu season in Australia is starting earlier and we are seeing cases of confirmed flu in September, it's worth having your flu injected now and ideally before Halloween," Dr. Ali Raja Deputy Chairman of the Department of Emergency Medicine at the Massachusetts General Hospital told Fox News:
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Doctors often look at Australia and the flu's southern hemisphere activity Indications of what our flu season might look like, as their winter ̵
Dr. Dyan Hes, a pediatrician at Gramercy Pediatrics in New York, said she already had two flu cases in the fall and one in the summer. All three children had not yet received their flu vaccine.
"We encourage children to get their flu vaccine early in the fall. Kids have a strong immune system and the vaccine should provide protection throughout the flu season, "Hes told Fox News.
This year, nearly 300,000 cases were confirmed in Australia, with the prevalent flu strain causing the well-known H3N2 virus to cause more serious illnesses and hospitalization.
According to the World Health Organization (WHO), seasonal influenza is an acute respiratory infection caused by influenza viruses circulating in all parts of the world.
"Influenza strains usually follow the migration patterns from the southern to the northern hemisphere, so it is expected that this A strain, H3N2, is the predominant strain in Australia, which we see here this winter, but this is not absolutely ", said Dr. Leonard R. Krilov, head of the Division of Pediatric Infectious Diseases at the NYU Winthrop Hospital, told Fox News.
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The effectiveness of the flu vaccine has seen its ups and downs over the years. The Centers for Disease Control and Control (CDC), according to recent studies, report that the influenza vaccine helps reduce the risk of flu in the entire population by 40 to 60 percent during the flu season (winter months) to lower.
On its website, the CDC states: "Current flu vaccines tend to be more effective against influenza B and influenza A (H1N1) viruses and offer less protection against influenza A (H3N2) viruses."  US scientists are looking at the last few years of the flu to develop a vaccine that will help predict how the flu will look this year, Raja said.
"So that they can make the vaccine a few months earlier, a flu season actually starts, they really make very sound assumptions about it [formula] because if they were to wait until the flu actually broke out and had those samples to work, they would never In time enough flu vaccines are given to take effect. Said Raja, who is also associate professor at Harvard Medical School.
Although the efficacy of the vaccine appears to be worse in a few years (according to the CDC, the vaccine from 2017 was only 40 percent effective), experts say that even if the flu vaccine does not exactly match the circulating strains, it's still worthwhile to get him.
"Even though it does not fully protect, the flu vaccine has been shown to alter the severity of a flu infection," said Krilov.
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Many scientists and experts know that the vaccine is not perfect, but especially for those at high risk for flu complications – such as pregnant women , small children, adults over 65 years and those with chronic health problems Asthma and heart disease – being vaccinated, could be life-saving.
A study looking at patients admitted to hospital with the H1N1 strain revealed that vaccinated patients had a 36 percent lower risk of death and a 19 percent lower ICU risk than patients receiving the vaccine were unvaccinated.
Krilov also said the vaccine is helping to create a herd immunity by protecting the people around you.