Jan 28, 2025 · Flu, also called influenza, is an infection of the nose, throat and lungs, which are part of the respiratory system. The flu is caused by a virus. Influenza viruses are different from the "stomach flu" viruses that cause diarrhea and vomiting. Most people with the flu …

Feb 28, 2025 · Influenza C virus is detected less frequently and usually causes mild infections, thus does not present public health importance. Influenza D viruses primarily affect cattle and are not known to infect or cause illness in people. Signs and symptoms. Symptoms of influenza usually begin around 2 days after being infected by someone who has the virus.

3 days ago · La gripe es causada por virus. Estos virus viajan por el aire en gotitas cuando alguien que tiene la infección tose, estornuda o habla. Puedes inhalar las gotitas de forma directa. También puedes entrar en contacto con los virus mediante un objeto, como el teclado de una computadora, y luego transferirlos a los ojos, la nariz o la boca.

Jan 28, 2025 · Types of flu tests you may have include: Molecular tests. These tests look for genetic material from the flu virus. Polymerase chain reaction tests, shortened to PCR tests, are molecular tests. You also may hear this type of test called an NAAT test, short for nucleic acid amplification test. Antigen tests.

May 13, 2010 · Influenza virus . Human influenza viruses belong to the Orthomyxoviridae family, which consists of the genera influenza A, B, and C virus, thogotovirus (carried by ticks, and infecting humans), and isavirus (infecting fish), as well as of a few other, newly described arboviruses. Only influenza A and B viruses cause epidemics in human beings.

Mar 25, 2025 · Seasonal influenza is an acute respiratory infection caused by influenza viruses which circulate in all parts of the world. It is characterized by a sudden onset of fever, cough (usually dry), headache, muscle and joint pain, severe malaise (feeling unwell), sore throat and a runny nose. The cough can be severe and can last two or more weeks.

The 2009 “Swine flu” A(H1N1) pandemic started in Mexico in early 2009 and spread rapidly to over 200 countries and overseas territories or communities. Between 105 000 and 395 000 people are thought to have died. The virus was a new strain of H1N1 virus, the same virus that led to the 1918 Great Flu pandemic and the 1977 Russian flu outbreak.

Feb 24, 2024 · This includes shaking hands or being close enough to breathe in the virus that a person sends out with a cough or sneeze. Getting COVID-19 and flu vaccines helps lower the chance that you will catch or spread these viruses or get seriously ill …

Jul 22, 2023 · Getting the flu vaccine may lower your risk of COVID-19 infection. The U.S. Food and Drug Administration (FDA) has given emergency use authorization or approval to COVID-19 vaccines in the U.S. A vaccine can prevent you from getting the COVID-19 virus or prevent you from becoming seriously ill if you get the COVID-19 virus.

Oct 4, 2024 · The flu is caused by a virus. Most people with the flu get better on their own. But influenza can cause serious complications for some groups of people. Getting a flu vaccine is the best way to prevent the flu and its complications for almost everyone. The flu vaccine can lower the risk of getting the flu.