Is the CDC collecting flu data this year?
The State and Territorial Epidemiologists Report, a weekly estimate of the geographic spread of influenza activity in each jurisdiction, was suspended for the 2020-21 influenza season due to the ongoing COVID-19 pandemic which impacted the data systems used to generate the estimates.
Where is the flu most popular?
Where is it most common? A study in 2015 looked into where influenza is most common, alongside how it spreads around the globe. While there are cases of it appearing all around the world, scientists found that it is far more prominent in the east than in the west, particularly in Southeast Asia.
What is the incidence of flu in the US?
While the effects of flu varies, it places a substantial burden on the health of people in the United States each year. CDC estimates that flu has resulted in 9 million – 41 million illnesses, 140,000 – 710,000 hospitalizations and 12,000 – 52,000 deaths annually between 2010 and 2020.
How many get the flu per year?
To estimate the number of flu illnesses that occur in the United States each year, CDC uses mathematical modeling in combination with data from traditional flu surveillance systems. CDC estimates that from 2010 to 2020, flu has resulted in between 9 million and 41 million illnesses annually in the United States.
Where does the flu go in the summer?
The influenza A virus does not lie dormant during summer but migrates globally and mixes with other viral strains before returning to the Northern Hemisphere as a genetically different virus, according to biologists who say the finding settles a key debate on what the virus does during the summer off season when it is …
What is the current incidence and prevalence of influenza?
Results. The statistical estimate of influenza incidence among all ages ranged from 3.0%–11.3% among seasons, with median values of 8.3% (95% confidence interval [CI], 7.3%–9.7%) for all ages, 9.3% (95% CI, 8.2%–11.1%) for children <18 years, and 8.9% (95% CI, 8.2%–9.9%) for adults 18–64 years.
How long is someone contagious when they have influenza?
People with flu are most contagious in the first three to four days after their illness begins. Most healthy adults may be able to infect others beginning 1 day before symptoms develop and up to 5 to 7 days after becoming sick.
How long are you contagious with the flu?
Period of Contagiousness People with flu are most contagious in the first 3-4 days after their illness begins. Some otherwise healthy adults may be able to infect others beginning 1 day before symptoms develop and up to 5 to 7 days after becoming sick.
Is sunlight good for flu?
We find that sunlight strongly protects against getting influenza. This relationship is driven almost entirely by the severe H1N1 epidemic in fall 2009. A 10% increase in relative sunlight decreases the influenza index in September or October by 1.1 points on a 10-point scale.
Why do viruses thrive in winter?
Viruses like influenza tend to enter through the mouth and nose, but our nasal passages usually have strong defenses against them. The cold weather, however, slows down our ability to clear the mucus in our noses, making it easier for viruses to infect our bodies.
What flu is prevalent now?
Influenza A(H3N2) viruses have been the most frequently detected influenza viruses this season. Of the 12,805 influenza positives reported this season by the public health labs and also tested for SARS-CoV-2, 555 (4.3%) were also positive for SARS-CoV-2.
Does Tamiflu make you less contagious?
Tamiflu (oseltamivir) is an antiviral drug that can shorten the duration of influenza (flu) symptoms. However, it will not stop the spread of the flu virus to others. You are still contagious on Tamiflu. The flu is contagious about one day before symptoms begin and up to a week after symptoms start.