Merck & Co. is recalling over a million doses of a childhood vaccine known as Hib, which prevents meningitis, pneumonia and other serious infections.
The recall was announced after testing found a sterilization problem in a Pennsylvania factory.
This has some parents worried.
"She's 18 months," said Chasity Young, about her daughter Elly.
Chasity Young has four children, including her daughter Elly, who recently got the Hib vaccine.
"She got it when she was 12 months and then get gets it again next month," Young said.
A number of children just like Elly have gotten this vaccine to protect themselves against meningitis and other serious infections.
Merck & Co. is now recalling 1.2-million doses of this vaccine.
"They are not sure if these doses are actually tainted with a particular bacteria. There are no known reports of anybody getting sick from it at this point," explained Dr. Debra Sowell, a pediatrician at Graves-Gilbert Clinic.
Dr. Debra Sowell is a pediatrician and says this includes her own patients.
"We in the last week gave close to 100 of this vaccine. Now we only had one that fell into that particular lot number, and that child is doing fine and not having any problems," Dr. Sowell said.
The doctor said there are only two companies that make the Hib vaccine and they've already pulled what stock they had from Merck and have re-ordered the other company's doses.
"Interestingly enough, Merck was already having a shortage problem with their particular vaccine, so we had already been ordering some of the other vaccine anyway," Dr.Sowell said.
She added that while parents may be a little worried about their child getting another Hib shot, there is no need to worry. The shots are still effective.
"It's still a great vaccine that has prevented many children from having serious illnesses over the years," Dr. Sowell assured.
There have been no reports suggesting contamination so far in any of the recalled doses.
They are considered potent so children who received these vaccines will not have to be re-vaccinated.
If you have any questions regarding this vaccine you should contact your child's doctor.