Influenza pandemic occurs when a new influenza virus emerges and spreads around the world, and most people do not have immunity. Viruses that have caused past pandemics typically originated from animal influenza viruses.
Some aspects of influenza pandemics can appear similar to seasonal influenza while other characteristics may be quite different. For example, both seasonal and pandemic influenza can cause infections in all age groups, and most cases will result in self-limited illness in which the person recovers fully without treatment. However, typical seasonal influenza causes most of its deaths among the elderly while other severe cases occur most commonly in people with a variety of medical conditions.
For both seasonal and pandemic influenza, the total number of people who get severely ill can vary. However, the impact or severity tends to be higher in pandemics in part because of the much larger number of people in the population who lack pre-existing immunity to the new virus. When a large portion of the population is infected, even if the proportion of those infected that go on to develop severe disease is small, the total number of severe cases can be quite large.
Influenza updates
Influenza weekly update, epidemiological Week 9, 2024 (25 Febreuary - 2 March)
All weekly updates
- 2024
- Influenza update, epidemiological week 9, 2024
- Influenza update, epidemiological week 8, 2024
- Influenza update, epidemiological week 7, 2024
- Influenza update, epidemiological week 6, 2024
- Influenza update, epidemiological week 5, 2024
- Influenza update, epidemiological week 4, 2024
- Influenza update, epidemiological week 3, 2024
- Influenza update, epidemiological week 2, 2024
- Influenza update, epidemiological week 1, 2024
- 2023
- Influenza update, epidemiological week 36, 2023
- Influenza update, epidemiological week 35, 2023
- Influenza update, epidemiological weel 34, 2023
- Influenza update, epidemiological week 33, 2023
- Influenza update, epidemiological week 31, 2023
- Influenza update, epidemiological week 30, 2023
- Influenza update, epidemiological week 29, 2023
- Influenza update, epidemiological week 28, 2023
- Influenza update, epidemiological week 27, 2023
- Influenza update, epidemiological week 13, 2023
- Influenza update, epidemiological week 12, 2023
- Influenza update, epidemiological week 11, 2023
- Influenza update, epidemiological week 10, 2023
- Influenza update, epidemiological week 9, 2023
- Influenza update, epidemiological week 8, 2023
- Influenza update, epidemiological week 7, 2023
- Influenza update, epidemiological week 6, 2023
- Influenza update, epidemiological week 5, 2023
- Influenza update, epidemiological week 4, 2023
- Influenza update, epidemiological week 3, 2023
- Influenza update, epidemiological week 2, 2023
- Influenza update, epidemiological week 1, 2023
- 2022
- Influenza update, epidemiological week 52, 2022
- Influenza update, epidemiological week 51, 2022
- Influenza update, epidemiological week 50, 2022
- Influenza update, epidemiological week 49, 2022
- Influenza update, epidemiological week 48, 2022
- Influenza update, epidemiological week 47, 2022
- Influenza update, epidemiological week 46, 2022
- Influenza update, epidemiological week 45, 2022
- Influenza update, epidemiological week 44, 2022
- Influenza update, epidemiological week 43, 2022
- Influenza update, epidemiological week 42, 2022
- Influenza update, epidemiological week 41, 2022
- Influenza update, epidemiological week 40, 2022
- Influenza update, epidemiological week 39, 2022
- Influenza update, epidemiological week 38, 2022
- Influenza update, epidemiological week 37, 2022
- Influenza update, epidemiological week 36, 2022
- Influenza update, epidemiological week 35, 2022
- Influenza update, epidemiological week 34, 2022
- Influenza update, epidemiological week 33, 2022
- Influenza update, epidemiological week 32, 2022
- Influenza update, epidemiological week 31, 2022
- Influenza update, epidemiological week 30, 2022
- Influenza update, epidemiological week 29, 2022
- Influenza update, epidemiological week 28, 2022
- Influenza update, epidemiological week 27, 2022
- Influenza update, epidemiological week 26, 2022
- Influenza update, epidemiological week 25, 2022
- Influenza update, epidemiological week 24, 2022
- Influenza update, epidemiological week 23, 2022
- Influenza update, epidemiological week 22, 2022
- Influenza update, epidemiological week 21, 2022
- Influenza update, epidemiological week 20, 2022
- Influenza update, epidemiological week 19, 2022
- Influenza update, epidemiological week 18, 2022
- Influenza update, epidemiological week 17, 2022
- Influenza update, epidemiological week 16, 2022
- Influenza update, epidemiological week 15, 2022
- Influenza update, epidemiological week 14, 2022
- Influenza update, epidemiological week 13, 2022
- Influenza update, epidemiological week 12, 2022
- Influenza update, epidemiological week 11, 2022
- Influenza update, epidemiological week 10, 2022
- Influenza update, epidemiological week 09, 2022
- Influenza update, epidemiological week 08, 2022
- Influenza update, epidemiological week 07, 2022
- Influenza update, epidemiological week 06, 2022
- Influenza update, epidemiological week 05, 2022
- Influenza update, epidemiological week 04, 2022
- Influenza update, epidemiological week 03, 2022
- Influenza update, epidemiological week 02, 2022
- Influenza update, epidemiological week 01, 2022
- 2021
- Influenza update, epidemiological week 52, 2021
- Influenza update, epidemiological week 51, 2021
- Influenza update, epidemiological week 50, 2021
- Influenza update, epidemiological week 49, 2021
- Influenza update, epidemiological week 48, 2021
- Influenza update, epidemiological week 47, 2021
- Influenza update, epidemiological week 46, 2021
- Influenza update, epidemiological week 45, 2021
- Influenza update, epidemiological week 44, 2021
- Influenza update, epidemiological week 43, 2021
- Influenza update, epidemiological week 42, 2021
- Influenza update, epidemiological week 41, 2021
- Influenza update, epidemiological week 40, 2021
- Influenza update, epidemiological week 39, 2021
- Influenza update, epidemiological week 38, 2021
- Influenza update, epidemiological week 37, 2021
- Influenza update, epidemiological week 36, 2021
- Influenza update, epidemiological week 35, 2021
- Influenza update, epidemiological week 34, 2021
- Influenza update, epidemiological week 33, 2021
- Influenza update, epidemiological week 32, 2021
- Influenza update, epidemiological week 31, 2021
- Influenza update, epidemiological week 30, 2021
- Influenza update, epidemiological week 29, 2021
- Influenza update, epidemiological week 28, 2021
- Influenza update, epidemiological week 27, 2021
- Influenza update, epidemiological week 26, 2021
- Influenza update, epidemiological week 25, 2021
- Influenza update, epidemiological week 24, 2021
- Influenza update, epidemiological week 23, 2021
- Influenza update, epidemiological week 22, 2021
- Influenza update, epidemiological week 21, 2021
- Influenza update, epidemiological week 20, 2021
- Influenza update, epidemiological week 19, 2021
- Influenza update, epidemiological week 18, 2021
- Influenza update, epidemiological week 17, 2021
- Influenza update, epidemiological week 16, 2021
- Influenza update, epidemiological week 15, 2021
- Influenza update, epidemiological week 14, 2021
- Influenza update, epidemiological week 13, 2021
- Influenza update, epidemiological week 12, 2021
- Influenza update, epidemiological week 11, 2021
- Influenza update, epidemiological week 10, 2021
- Influenza update, epidemiological week 09, 2021
- Influenza update, epidemiological week 08, 2021
- Influenza update, epidemiological week 07, 2021
- Influenza update, epidemiological week 06, 2021
- Influenza update, epidemiological week 05, 2021
- Influenza update, epidemiological week 04, 2021
- Influenza update, epidemiological week 03, 2021
- Influenza update, epidemiological week 02, 2021
- Influenza update, epidemiological week 01, 2021
- 2020
- Influenza update, epidemiological week 11, 2020
- Influenza update, epidemiological week 10, 2020
- Influenza update, epidemiological week 09, 2020
- Influenza update, epidemiological week 08, 2020
- Influenza update, epidemiological week 07, 2020
- Influenza update, epidemiological week 06, 2020
- Influenza update, epidemiological week 05, 2020
- Influenza update, epidemiological week 04, 2020
- Influenza update, epidemiological week 03, 2020
- Influenza update, epidemiological week 02, 2020
- Influenza update, epidemiological week 01, 2020
- 2019
- Influenza update, epidemiological week 52, 2019
- Influenza update, epidemiological week 51, 2019
- Influenza update, epidemiological week 50, 2019
- Influenza update, epidemiological week 49, 2019
- Influenza update, epidemiological week 48, 2019
- Influenza update, epidemiological week 47, 2019
- Influenza update, epidemiological week 46, 2019
- Influenza update, epidemiological week 45, 2019
- Influenza update, epidemiological week 44, 2019
- Influenza update, epidemiological week 43, 2019
- Influenza update, epidemiological week 42, 2019
- Influenza update, epidemiological week 41, 2019
- Influenza update, epidemiological week 40, 2019
- Influenza update, epidemiological week 39, 2019
- Influenza update, epidemiological week 38, 2019
- Influenza update, epidemiological week 37, 2019
- Influenza update, epidemiological week 36, 2019
- Influenza update, epidemiological week 35, 2019
- Influenza update, epidemiological week 34, 2019
- Influenza update, epidemiological week 33, 2019
- Influenza update, epidemiological week 32, 2019
- Influenza update, epidemiological week 31, 2019
- Influenza update, epidemiological week 30, 2019
- Influenza update, epidemiological week 29, 2019
- Influenza update, epidemiological week 28, 2019
- Influenza update, epidemiological week 27, 2019
- Influenza update, epidemiological week 26, 2019
- Influenza update, epidemiological week 25, 2019
- Influenza update, epidemiological week 24, 2019
- Influenza update, epidemiological week 23, 2019
- Influenza update, epidemiological week 22, 2019
- Influenza update, epidemiological week 21, 2019
- Influenza update, epidemiological week 20, 2019
- Influenza update, epidemiological week 19, 2019
- Influenza update, epidemiological week 18, 2019
- Influenza update, epidemiological week 17, 2019
- Influenza update, epidemiological week 16, 2019
- Influenza update, epidemiological week 15, 2019
- Influenza update, epidemiological week 14, 2019
- Influenza update, epidemiological week 13, 2019
- Influenza update, epidemiological week 12, 2019
- Influenza update, epidemiological week 11, 2019
- Influenza update, epidemiological week 10, 2019
- Influenza update, epidemiological week 09, 2019
- Influenza update, epidemiological week 08, 2019
- Influenza update, epidemiological week 07, 2019
- Influenza update, epidemiological week 06, 2019
- Influenza update, epidemiological week 05, 2019
- Influenza update, epidemiological week 04, 2019
- Influenza update, epidemiological week 03, 2019
- Influenza update, epidemiological week 02, 2019
- Influenza update, epidemiological week 01, 2019
- 2018
- Influenza update, epidemiological week 52, 2018
- Influenza update, epidemiological week 51, 2018
- Influenza update, epidemiological week 50, 2018
- Influenza update, epidemiological week 49, 2018
- Influenza update, epidemiological week 48, 2018
- Influenza update, epidemiological week 47, 2018
- Influenza update, epidemiological week 46, 2018
- Influenza update, epidemiological week 45, 2018
- Influenza update, epidemiological week 44, 2018
- Influenza update, epidemiological week 43, 2018
- Influenza update, epidemiological week 42, 2018
- Influenza update, epidemiological week 41, 2018
- Influenza update, epidemiological week 40, 2018
- Influenza update, epidemiological week 39, 2018
- Influenza update, epidemiological week 38, 2018
- Influenza update, epidemiological week 37, 2018
- Influenza update, epidemiological week 36, 2018
- Influenza update, epidemiological week 35, 2018
- Influenza update, epidemiological week 34, 2018
- Influenza update, epidemiological week 33, 2018
- Influenza update, epidemiological week 32, 2018
- Influenza update, epidemiological week 31, 2018
- Influenza update, epidemiological week 30, 2018
- Influenza update, epidemiological week 29, 2018
- Influenza update, epidemiological week 28, 2018
- Influenza update, epidemiological week 27, 2018
- Influenza update, epidemiological week 26, 2018
- Influenza update, epidemiological week 25, 2018
- Influenza update, epidemiological week 24, 2018
- Influenza update, epidemiological week 23, 2018
- Influenza update, epidemiological week 22, 2018
- Influenza update, epidemiological week 21, 2018
- Influenza update, epidemiological week 20, 2018
- Influenza update, epidemiological week 19, 2018
- Influenza update, epidemiological week 18, 2018
- Influenza update, epidemiological week 17, 2018
- Influenza update, epidemiological week 16, 2018
- Influenza update, epidemiological week 15, 2018
- Influenza update, epidemiological week 14, 2018
- Influenza update, epidemiological week 13, 2018
- Influenza update, epidemiological week 12, 2018
- Influenza update, epidemiological week 11, 2018
- Influenza update, epidemiological week 10, 2018
- Influenza update, epidemiological week 09, 2018
- Influenza update, epidemiological week 08, 2018
- Influenza update, epidemiological week 07, 2018
- Influenza update, epidemiological week 06, 2018
- Influenza update, epidemiological week 05, 2018
- Influenza update, epidemiological week 04, 2018
Influenza monthly update, February 2024
In February 2024, 19 out of 21 Member States with existing influenza surveillance systems in the WHO Eastern Mediterranean Region (EMR) reported influenza data to FluNet and/or EMFLU (Afghanistan, Bahrain, Egypt, the Islamic Republic of Iran, Iraq, Jordan, Lebanon, Libya, Morocco, the occupied Palestinian territory, Oman, Pakistan, Qatar, Saudi Arabia, Somalia, the Syrian Arab Republic, Tunisia, the United Arab Emirates, and Yemen)
All monthly updates
- 2024
- Influenza monthly update, Febreuary 2024
- Influenza monthly update, January 2024
- 2023
- Influenza monthly update, November 2023
- Influenza monthly update, October 2023
- Influenza monthly update, September 2023
- Influenza monthly update, August 2023
- Influenza monthly update, July 2023
- Influenza monthly update, June 2023
- Influenza monthly update, May 2023
- Influenza monthly update, April 2023
- Influenza monthly update, March 2023
- Influenza monthly update, February 2023
- Influenza monthly update, January 2023
- 2022
- Influenza monthly update, December 2022
- Influenza monthly update, November 2022
- Influenza monthly update, October 2022
- Influenza monthly update, September 2022
- Influenza monthly update, August 2022
- Influenza monthly update, July 2022
- Influenza monthly update, June 2022
- Influenza monthly update, May 2022
- Influenza monthly update, April 2022
- Influenza monthly update, March 2022
- Influenza monthly update, February 2022
- Influenza monthly update, January 2022
- 2021
- Influenza monthly update, December 2021
- Influenza monthly update, November 2021
- Influenza monthly update, October 2021
- Influenza monthly update, September 2021
- Influenza monthly update, August 2021
- Influenza monthly update, July 2021
- Influenza monthly update, June 2021
- Influenza monthly update, May 2021
- Influenza monthly update, April 2021
- Influenza monthly update, March 2021
- Influenza monthly update, February 2021
- Influenza monthly update, January 2021