The pattern continued through June of the same year.
China has excellent virus surveillance systems and right now we don't need to panic.As a medical reporter, I'm used to being in hospitals and even in intensive care units. In the central regions (West North Central and West South Central) one peak in influenza A activity was seen in mid-February. It's been a little over a decade since the world experienced its last pandemic, the 2009 H1N1 swine flu.
As of 2009, the known SIV strains include influenza C and the subtypes of influenza A known as H1N1, H1N2, H2N1, H3N1, H3N2, and H2N3. Differences in rate estimates between the NVSN and the EIP systems are likely due to the different case-finding methods, diagnostic tests used, and the populations monitored. This represents a change only in the influenza A (H1N1) component. The recruit fell ill on September 1 and died of pneumonia on September 10. The geographic distribution of influenza activity peaked during the week ending February 24, 2007 (week 8), when 25 states reported widespread activity and 19 states reported regional activity. Although the 2009 H1N1 outbreak reached epidemic levels of infection early in 2009, it did not contribute to epidemic levels of pneumonia and influenza related deaths until October 2009.In early October 2009, the Centers for Disease Control and Prevention announced that swine flu was widespread across the country. That's really good news, and that would fit with what we've seen outside of Mexico.Moreover, another Canadian expert, Neil Rau, criticized the WHO's decision to raise its Pandemic alert to level 5, saying:I don't agree with (the WHO) because I think it's a panic metre, not a pandemic metre. These recommendations were based on antigenic analyses of recently isolated influenza viruses, epidemiologic data, post-vaccination serologic studies in humans, and the availability of candidate vaccine strains and reagents.The proportion of deaths in the United States attributed to pneumonia and influenza (P&I) as reported by the 122 Cities Mortality Reporting System peaked three times, once at 7.5% during the week ending January 20, 2007 (week 3), once at 7.7% during the week ending February 24, 2007 (week 8), and again at 7.5% during the week ending March 24, 2007 (week 12), but did not exceed the epidemic thresholdAs of August 6, 2007, among persons aged <18 years, a total of 68 deaths associated with influenza infections occurring during October 1, 2006-May 19, 2007, were reported to CDC. A/Solomon Islands/3/2006 is a recent antigenic variant of the 2006-07 vaccine strain A/New Caledonia/20/99. But covering swine flu in 2009 was a sight I won't easily forget. As of November 20, 2009, the CDC reported sharp declines in H1N1 activity throughout the United States, with influenza-like illness (which may also include meningitis, pneumonia, strep pharyngitis, gastroenteritis, and the common cold) accounting for 5.5% of doctors visits, down sharply from 8% in late October, the peak of the second wave. Most flu vaccine companies can not make both seasonal flu vaccine and pandemic flu vaccine at the same time. “Swine Flu” 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.
[...] If that flu-like illness is not deadly, I don't know what the cause for alarm is for people who are not really sickened by this virus.
The total number of confirmed cases varied from 27,717 (Towards the middle of June 2009, the number of US cases surpassed those of Mexico, which had been the previous leader in diagnosed cases of the disease. Early cases were associated with recent travel to Mexico; many were students who had traveled to Mexico for spring break.The proportion of US deaths due to pneumonia and influenza climbed above the epidemic threshold in the 2007–2008 winter flu season but not in the 2008–2009 season. Two hundred and twenty (76%) of the 289 viruses showed reduced titers with antisera produced against A/Wisconsin/67/2005.Influenza B viruses currently circulating can be divided into two antigenically distinct lineages represented by B/Yamagata/16/88 and B/Victoria/02/87 viruses. Please update this article to reflect recent events or newly available information.