Sentence examples for serotypes from inspiring English sources

In 1983 the vaccine was expanded from 14 serotypes (the most common lethal pneumococcal strains) to 23; by 2007 more than 80 strains were known.

Vaccines, whether killed or live, may contain strains of all three poliovirus serotypes PV1, PV2, and PV3 or of just one or two (serotypes are closely related though distinguishable forms).

For that reason polio vaccines are trivalent that is, designed to generate antibodies to all three poliovirus serotypes (see below).

There are three types of OPV: trivalent (tOPV), which contains all three serotypes of live attenuated polioviruses; bivalent (bOPV), which contains two of the three serotypes; and monovalent (mOPV), which contains one of the three serotypes.

The serotypes continued to spread on a pandemic level, eventually reaching areas of South and Central America, Cuba, and Puerto Rico, where in 1977 an epidemic lasting from July to December affected some 355,000 people.

These serotypes are members of the Flavivirus genus, which also contains the viruses that cause yellow fever, and can occur in any country where the carrier mosquitoes breed.

The most-widespread serotype is PV1.

The third serotype, PV3, is close to eradication.

Immunity to one serotype does not convey immunity to any of the others.

Persons who recover from an infection caused by one serotype of poliovirus are permanently immune to reinfection by that serotype but not to infection by the others.

The specificity of mOPVs increases their effectiveness, such that a single dose of mOPV1, which is effective only against PV1, confers immunity to serotype 1 in roughly 70 to 80 percent of children, whereas a single dose of tOPV confers immunity to serotype 1 in about 20 to 40 percent of children.