H1n1 like virus

However, not all viruses emerge directly from reassortment events. For example, the origins of the virus are not precisely known, but experts think it is likely that the virus may have resulted from a bird influenza virus directly infecting humans and pigs at about the same time without reassortment.

The emergence of the H1N1 influenza virus in humans highlights the need for better surveillance of influenza viruses in pigs and other animals. The mixing of influenza genes in pigs can result in the emergence of viruses with pandemic potential in humans.

Improved surveillance of influenza in pigs and other animals may help to detect the emergence of influenza viruses with the potential to cause illness and spread among people, possibly resulting in a pandemic. Early detection of such viruses can alert public health officials and aid in pandemic preparedness through the development of appropriate diagnostic tests and influenza vaccine candidate viruses, if necessary.

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The H1N1 virus that caused that pandemic is now a regular human flu virus and continues to circulate seasonally worldwide. Clin Infect Dis. Get Email Updates. To receive email updates about this page, enter your email address: Email Address. What's this? Links with this icon indicate that you are leaving the CDC website.

Linking to a non-federal website does not constitute an endorsement by CDC or any of its employees of the sponsors or the information and products presented on the website. You will be subject to the destination website's privacy policy when you follow the link. CDC is not responsible for Section compliance accessibility on other federal or private website. Cancel Continue. Over , deaths have occurred in the United States. Meanwhile, a person that has H1N1 influenza may pass it to between one to two other people.

Much fewer people experienced severe or critical illness. The WHO estimates that, while COVID is mild 80 percent of the time, 20 percent of people who contract the virus can become seriously or critically ill. The treatment for H1N1 influenza included supportive care and antiviral medications. Supportive care involves:. The H1N1 virus was also susceptible to antiviral medications that had been previously used and are still used for seasonal flu, such as oseltamivir Tamiflu and zanamivir Relenza.

Over time, various therapies have either been approved by the FDA or authorized for emergency use. Additional treatments are also available to people who are hospitalized or at a high risk of serious illness. There are various similarities and differences between these two pandemics. There are different types and subtypes of flu. B in terms of prevalence, how contagious they are, what the…. The science of vaccine development has advanced since the outbreak of H1N1 or swine flu.

Experts say we can learn from what happened when that…. The H1N1 flu virus strain is included in the seasonal flu vaccine, including the vaccine for The signs and symptoms of flu caused by the H1N1 virus are similar to those of infections caused by other flu strains and can include:.

It's not necessary to see a doctor if you're generally healthy and develop flu signs and symptoms, such as fever, cough and body aches. Call your doctor, however, if you have flu symptoms and you're pregnant or you have a chronic disease, such as asthma, emphysema, diabetes or a heart condition, because you have a higher risk of flu complications. If you have emergency signs and symptoms of the flu, get medical care right away.

For adults, emergency signs and symptoms can include:. Influenza viruses such as H1N1 infect the cells that line your nose, throat and lungs. The virus enters your body when you inhale contaminated droplets or transfer live virus from a contaminated surface to your eyes, nose or mouth.

If you live in or travel to an area where many people are infected with the H1N1 virus, you may be exposed to the virus. Each year's seasonal flu vaccine protects against the three or four influenza viruses that are expected to be the most common during that year's flu season.

The flu vaccine can reduce your risk of the flu and its severity and lower the risk of having serious illness from the flu and needing to stay in the hospital. Flu vaccination is especially important in the flu season because the flu and coronavirus disease COVID cause similar symptoms.

Preventing the flu and reducing the severity of flu illness and hospitalizations could also lessen the number of people needing to stay in the hospital. The flu vaccine is available as an injection and as a nasal spray. The nasal spray is approved for use in healthy people ages 2 through 49 years old. The nasal spray isn't recommended for some groups, such as pregnant women, children between 2 and 4 years old with asthma or wheezing, and people who have compromised immune systems.

For example, you may need to practice social distancing physical distancing and stay at least 6 feet 2 meters from others outside your household. You may also need to wear a cloth face mask when around people outside your household. Mayo Clinic does not endorse companies or products.