COVID-19 vs. flu: Similarities and differences - Mayo Clinic
Jul 22, 2023 · COVID-19 is caused by a coronavirus called SARS-CoV-2, while flu is caused by influenza A and B viruses. COVID-19 and flu symptoms. Symptoms of COVID-19 and the flu appear at different times and have some differences. COVID-19 symptoms generally appear 2 to 14 days after exposure. Flu symptoms usually appear about 1 to 4 days after exposure.
What's the difference between H1N1 flu and influenza A?
Jul 4, 2024 · Flu, also called influenza, is a viral infection of the nose, throat and lungs, which are part of the respiratory system. The viruses that cause influenza are divided into four categories named with letters. Influenza A is the most common type. The others are influenza B, C and D.
Influenza (flu) - Symptoms and causes - Mayo Clinic
Jan 7, 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 …
COVID-19, cold, allergies and the flu: What are the differences?
Nov 27, 2024 · COVID-19 and the flu are both respiratory diseases that spread from person to person. They're also both caused by viruses. COVID-19 is caused by the SARS-CoV-2 virus. The flu is caused by influenza A, B and C viruses. All of these viruses spread in similar ways. COVID-19 and the flu cause many of the same symptoms, but there are some differences.
Bird flu (avian influenza) - Symptoms and causes - Mayo Clinic
Jun 8, 2024 · Bird flu, also called avian influenza, is caused by influenza type A virus infections in bird species. Depending on the strain, bird flu may cause the bird to have no symptoms, mild illness, serious illness or lead to the death of
High-dose flu vaccines: How are they different? - Mayo Clinic
Oct 1, 2024 · But any flu vaccination is better than none. So if you can't get a high-dose or adjuvanted flu vaccine, get the flu vaccine that is offered. Like other flu vaccines, high-dose and adjuvanted flu vaccines are updated every year. This helps protect against the flu strains most likely to cause the flu during the upcoming flu season.
H1N1 flu (swine flu) - Symptoms and causes - Mayo Clinic
Mar 23, 2023 · Flu vaccination is especially important because the flu and coronavirus disease 2019 (COVID-19) cause similar symptoms. Both COVID-19 and the flu may be spreading at the same time. Vaccination is the best way to protect against both. Flu vaccination could lessen symptoms that might be confused with those caused by COVID-19.
Influenza (flu) - Diagnosis and treatment - Mayo Clinic
Jan 7, 2025 · To diagnose the flu, also called influenza, your healthcare professional does a physical exam, looks for symptoms of flu and possibly orders a test that detects flu viruses. The viruses that cause flu spread at high levels during certain times of the year in the Northern and Southern hemispheres. These are called flu seasons.
Flu shot: Your best bet for avoiding influenza - Mayo Clinic
Oct 4, 2024 · Reviews of flu season data since 2009 find that vaccine protection ranges from a low of 22% to a high of 56%. Looking at the U.S. population, that means millions of fewer illnesses and visits to a healthcare professional. Flu vaccine also lowers the number of people with an illness who need hospital care or who die of influenza.
Flu symptoms: Should I see my doctor? - Mayo Clinic
Vomiting and diarrhea also are symptoms of the flu but this is more common in children than adults. Factors that can raise your risk of getting serious flu or flu-related complications include: Age. Seasonal flu tends to be more serious in young children, especially those age 12 months or younger, and adults older than age 65.