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Convulsion Risk From CSL Flu Vaccine Linked To Components

Convulsions in children immunized with a CSL Ltd. (CSL) flu shot probably were caused by an excessive immune response to viral components in the vaccine, according to preliminary findings of a two-year study.

Use in children younger than 6 years of CSL’s Fluvax vaccine, to protect against the three main influenza strains circulating in the 2010 Southern Hemisphere winter, was suspended by Australian health officials in April of that year. Doctors reported a nine-fold increase in fever and convulsions in children following immunization with Fluvax.

CSL, the Southern Hemisphere’s only flu-vaccine maker, hasn’t been able to license Fluvax for use in young children since the complications were noted. An investigation into the cause indicated CSL’s manufacturing method preserves more short- gene fragments and lipids from the virus than other makers, the Melbourne-based company said today.
 
 

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