Symptoms of h3n2 virus

Unlike the 1918–19 and 1957 flu pandemics, the 1968 pandemic was caused by an influenza virus that was only slightly different from earlier influenza strains. Persons exposed to the 1957 virus in particular apparently retained immune protection against the 1968 virus, explaining the relative mildness of the 1968 outbreak. 1968 flu pandemic, also called Hong Kong flu pandemic of 1968 or Hong Kong flu of 1968, global outbreak of The 1968 pandemic was initiated by the emergence of a Although the 1968 flu outbreak was associated with comparatively few deaths worldwide, the virus was highly The 1968 flu pandemic caused illness of varying degrees of severity in different populations. For example, whereas illness was diffuse and affected only small numbers of people in Japan, it was widespread and deadly in the United States. Infection caused upper respiratory symptoms typical of influenza and produced symptoms of chills,