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- The new H1N1 virus emerged in the United States in April 2009, in Texas, New York, California, and several other places. The virus was suspected of having been carried to those states by individuals who had been in affected areas in Mexico and then traveled from there.
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Cases of H1N1 spread rapidly across the United States, with particularly severe outbreaks in Texas, New York, Utah, and California. Early cases were associated with recent travel to Mexico; many were students who had traveled to Mexico for spring break. [139]
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Jun 16, 2010 · The emergence and spread of the 2009 H1N1 virus resulted in extraordinary influenza-like illness activity in the United States throughout the summer and fall months of 2009.
The United States experienced its first wave of 2009 H1N1 activity in the spring of 2009, followed by a second, larger wave of 2009 H1N1 activity in the fall and winter, during typical “flu season” time for the U.S.
- The Response
- Lasting Impacts
- Pandemic Preparedness
Two days after CDC confirmed the first case, laboratory testing confirmed a second infection with the same virus in another patient. CDC worked closely with state and local public health officials to investigate reported cases and to detect additional cases of human illness with this virus. On April 21, CDC published a special report in the Morbidi...
CDC’s response lasted nearly a year. Over those many months, CDC remained at the forefront of the global response—sharing laboratory reagents for diagnostic testing with states and ministries of health; using gene sequencing; estimating U.S. cases, hospitalizations, and deaths from the pandemic every month; and working to implement a domestic vacci...
Influenza pandemics are uncommon; only three have occurred since the 1918 pandemic. Yet, influenza pandemics are one of the world’s greatest public health threats because of their potential to overwhelm public health and healthcare systems, and cause widespread illness, death, and social disruption. And because influenza viruses continuously mutate...
The new H1N1 virus emerged in the United States in April 2009, in Texas, New York, California, and several other places. The virus was suspected of having been carried to those states by individuals who had been in affected areas in Mexico and then traveled from there.
- Kara Rogers
Aug 5, 2022 · The virus spread quickly across the U.S. and around the world. It spread quickly because it was a new type of flu virus. Young people weren’t immune to the new virus yet.
When the pandemic H1N1 virus emerged in April 2009, laboratories were quickly overwhelmed by sharp increases in testing demands. CDC moved quickly to expand domestic and global capacity to detect the virus by using its genetic sequence data to update existing rRT-PCR test kits.
