A weakened batch of the H1N1 flu vaccine in the inventory of the Rock Island County Health Department has been recalled by the manufacturer, Sanofi Pasteur.

That means the injectable H1N1 vaccine will not be available this week for children 6-35 months old. Public health officials are seeking other sources of the injectable version and plan to resume that type of vaccination next week, beginning Monday, Feb. 8.

There are adequate amounts of the injectable vaccine for those older than 36 months, including adults. In addition, vaccine in a nasal mist form is available for most people who are 2 to 49 years old.

Sanofi Pasteur recalled the children's vaccine because it was not potent enough, officials said. The vaccine is not harmful, but it may not be fully effective as it creates protection for the patient. Children who recently received the vaccine do not have to be revaccinated, the health department announced.

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Scheduled Rock Island County Health Department clinics this week are: 8 a.m. to noon and 1-4:30 p.m. Tuesday at the health department, 2112 25th Ave., Rock Island; and 2-5:30 p.m. Wednesday at Our Lady of Guadalupe Church, 800 17th St., Silvis, Ill.