Clinical Microbiology Reviews, 07 1996, 423-434, Vol 9, No. 3
K Midthun and AZ Kapikian
Rotavirus vaccine development has focused on the delivery of live
attenuated rotavirus strains by the oral route. The initial "Jennerian"
approach involving bovine (RIT4237, WC3) or rhesus (RRV) rotavirus vaccine
candidates showed that these vaccines were safe, well tolerated, and
immunogenic but induced highly variable rates of protection against
rotavirus diarrhea. The goal of a rotavirus vaccine is to prevent severe
illness that can lead to dehydration in infants and young children in both
developed and developing countries. These studies led to the concept that a
multivalent vaccine that represented each of the four epidemiologically
important VP7 serotypes might be necessary to induce protection in young
infants, the target population for vaccination. Human-animal rotavirus
reassortants whose gene encoding VP7 was derived from their human rotavirus
parent but whose remaining genes were derived from the animal rotavirus
parent were developed as vaccine candidates. The greatest experience with a
multivalent vaccine to date has been gained with the quadrivalent
preparation containing RRV (VP7 serotype 3) and human-RRV reassortants of
VP7 serotype 1, 2, and 4 specificity. Preliminary efficacy trial results in
the United States have been promising, whereas a study in Peru has shown
only limited protection. Human-bovine reassortant vaccines, including a
candidate that contains the VP4 gene of a human rotavirus (VP4 serotype
1A), are also being studied.
Copyright © 1996 by the American Society for Microbiology. All rights reserved.
Rotavirus vaccines: an overview
Division of Vaccines and Related Products Application, Food and Drug Administration, Rockville, Maryland 20852, USA.
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