Skip to main content

MMRV vaccine


CDC clarifies preference on childhood vaccines

WASHINGTON (Reuters) - Children who get a combined vaccine against measles, mumps, rubella and chicken pox are slightly more likely to have seizures compared to those getting two separate shots for the same diseases, U.S. officials said on Thursday.

The seizures are not usually life-threatening and the U.S. Centers for Disease Control and Prevention said it was no longer expressing a preference that children get the so-called MMRV combined vaccine rather than two shots -- the MMR vaccine against measles, mumps and rubella (German measles) and a separate one against varicella (chicken pox).

The CDC said it made the change after seeing evidence that children who got the combined MMRV vaccine faced an elevated, but still very small, risk of suffering febrile seizures after vaccination compared to those who got the two shots.

A febrile seizure is a convulsion in young children associated with an increase in body temperature, often from an infection. While frightening, the seizures are not usually dangerous and only a small percentage of children who experience one go on to develop epilepsy.

Dr. John Iskander, the acting director of the CDC's Immunization Safety Office, said it remained very important that parents get their children vaccinated against these diseases.

"These are vaccines that have had enormous public health benefits," Iskander said.

The CDC said the availability of the MMRV vaccine, made by pharmaceutical company Merck, already was limited in the United States because of manufacturing constraints unrelated to vaccine safety, and was not expected to be widely available until 2009.

The CDC said a study examined the risk for febrile seizures seven to 10 days after vaccination among 43,353 children ages 12 months to 23 months who received the MMRV vaccine and 314,599 children of the same age who received the MMR vaccine and chicken pox vaccine administered separately.

It found a rate of febrile seizure of nine per 10,000 vaccinations among MMRV recipients, and four per 10,000 among children who got separate MMR and chicken pox shots. Of 166 children who had febrile seizures after either type of vaccination, 26 were hospitalized and none died, the CDC said.

(Reporting by Will Dunham; Editing by Maggie Fox and Eric Beech)

 


Comments

Post a Comment

Popular posts from this blog

Isotretinoin in India: A tragedy in the offing

Isotretinoin in India: A tragedy in the offing Wednesday, March 28, 2007 08:00 IST  Seema Thakral Isotretinoin is the drug of choice for severe calcitrant cystic acne vulgaris, which often causes scarring and depression from disfigurement. Isotretinoin has been called "the greatest medical advance of the 1980's." A majority of patients with acne are permanently cleared after a four to five months course of treatment. It has also been used off-label for a variety of oncology uses including: cervical cancer, head and neck cancer, squamous cell cancer of the skin, juvenile chronic myelogenous leukemia (CML), and neuroblastoma. However, the drug is a proved teratogen and carries a significant risk of birth defects, if it taken during pregnancy. Birth defects, which have been documented following isotretinoin exposure include abnormalities of the face, eyes, ears, skull, central nervous system, cardiovascular system, and thymus and parathyroid glands. There is an increased ris...
Post a Comment
Read more

Combination Vaccine for Kids withdrawn

A vaccine that combines conventional MMR (Measles, Mumps, Rubella) with Chikenpox has been withdrawn in the United States due to a higher rate of seizures in children. In a study children aged 12 to 23 months who received the combined MMR cum Chickenpox vaccine had double the rate of seizures compared to children who got separate vaccine for MMR and chickenpox. This equates to one additional case of convulsion per 2000 vaccinations.
Post a Comment
Read more

BE guidelines regarding investigator

BE guidelines recommend investigator should possess appropriate medical qualification, experience for conducting pharmacokinetic studies Can chairperson of EC directly write to sponsor to clarify some of the queries of clinical trial raised in EC meeting? Dr. Sreevatsa Please see an extract from FDA's comment on IRB-sponsor relationship. The interrelationship and interaction between the research sponsor (e.g., drug, biologic and device manufacturers), the clinical investigator and the Institutional Review Board (IRB) may be very complex. The regulations do not prohibit direct sponsor-IRB contacts, although, the sponsor-IRB interaction customarily occurs through the investigator who conducts the clinical study. The clinical investigator generally provides the communication link between the IRB and the sponsor. Such linkage is agreed to by the sponsors and investigators when they sign forms FDA-1571 and FDA-1572, respectively, for drug and biologic studies or a...
Post a Comment
Read more