When did H1N1 first start?
In the spring of 2009, a novel influenza A (H1N1) virus emerged. It was detected first in the United States and spread quickly across the United States and the world. This new H1N1 virus contained a unique combination of influenza genes not previously identified in animals or people.
Where did H1N1 first appear?
The 2009 swine flu outbreak originated in Veracruz, Mexico. Health workers traced the virus to a pig farm in this southeastern Mexican state. A young boy who lived nearby was among the first people to contract the swine flu.
When did H1N1 start and end?
The WHO declared the swine flu outbreak a pandemic on June 11, 2009. 5. Between April 12, 2009, and April 10, 2010, the CDC estimates swine flu caused 60.8 million illnesses, 273,304 hospitalizations and 12,469 deaths in the U.S.
When was H1N1 vaccine released?
The rollout of the H1N1 or swine flu vaccine in 2009 was plagued by shortages and miscommunication. These problems led to a drop in public confidence. Experts hope lessons learned from the H1N1 vaccine rollout are applied to the COVID-19 vaccine.
Did the swine flu come from China?
2020 G4 EA H1N1 publication G4 EA H1N1, also known as the G4 swine flu virus (G4) is a swine influenza virus strain discovered in China. The virus is a variant genotype 4 (G4) Eurasian avian-like (EA) H1N1 virus that mainly affects pigs, but there is some evidence of it infecting people.
When was the last virus pandemic?
The 1918 influenza pandemic was the most severe pandemic in recent history. It was caused by an H1N1 virus with genes of avian origin. Although there is not universal consensus regarding where the virus originated, it spread worldwide during 1918-1919.
How quickly did H1N1 spread?
The known incubation period for H1N1 swine flu ranges from 1 to 4 days, with the average around 2 days in most individuals, but some individuals, it may be as long as 7 days. The contagious period for adults starts about 1 day before symptoms develop and lasts around 5 to 7 days after the person develops symptoms.
Is there a vaccine for H1N1 virus?
The U.S. Food and Drug Administration (FDA) has approved the use of one dose of vaccine against 2009 H1N1 influenza virus for persons 10 years of age and older. For children who are 6 months through 9 years of age, two doses of the vaccine are recommended. These two doses should be separated by 4 weeks.
How did swine flu jump to humans?
Transmission of swine influenza viruses to humans is uncommon. However, the swine influenza virus can be transmitted to humans via contact with infected pigs or environments contaminated with swine influenza viruses.
How long did swine flu outbreak last?
The 2009 swine flu pandemic was an influenza pandemic that lasted about 19 months, from January 2009 to August 2010, and was the second of two pandemics involving H1N1 influenza virus (the first being the 1918–1920 Spanish flu pandemic).
How long did the 1918 pandemic last?
The influenza pandemic of 1918–19, also called the Spanish flu, lasted between one and two years. The pandemic occurred in three waves, though not simultaneously around the globe.
What age group did H1N1 affect the most?
The US Centre for Disease and Control Prevention (CDC) estimated that 150, 000 to 575,000 people died from (H1N1) pandemic virus infection in the first year of the outbreak. 80% of the virus-related deaths were estimated to occur in those < 65 years of age.