Definition of vaccine
: a preparation of killed microorganisms, living attenuated organisms, or living fully virulent organisms that is administered to produce or artificially increase immunity to a particular disease
Recent Examples of vaccine from the Web
But then, as Mozart's telling goes, Andy fell ill with polio, the vaccine for which was still quite new and not widely distributed.
Preemies are at high risk for respiratory infections because of their underdeveloped lungs, for example; the most dangerous is Respiratory Syncytial Virus (RSV), which Layla's pediatrician gave her a special, but expensive, vaccine for.
Broadly – this is mainly for international travel – there are three main issues: Vaccines and malaria, water and foodborne illnesses, and injuries.
Borch has received six shots so far, including the rabies vaccine, and immunoglobulin and tetanus injections.
Here, the common refrain goes, is an unmoored country where manufacturers knowingly sell toxic baby formula and fraudulent children’s vaccines.
Vaccines are available, but veterinarians can advise whether they are warranted.
Pinkerton beat tuberculosis and has since become an advocate against the disease, meeting with members of Congress and the Centers for Disease Control and Prevention to talk about vaccine research, testing protocols and the need for new drugs.
The World Health Organization provides some training to South Sudan’s health officials and the U.N. children’s agency provides the vaccines to the government.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'vaccine'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
Origin and Etymology of vaccine
earlier, “fluid from cowpox pustules used in inoculation,” noun use of vaccine “of cowpox” (in the phrases vaccine disease, vaccine matter), borrowed from New Latin vaccina (in variolae vaccinae “cowpox”), going back to Latin, feminine of vaccīnus “of or from a cow,” from vacca “cow” (perhaps akin to Sanskrit vaśā “cow”) + -īnus 1-ine; in extended sense, “preparation of organisms administered to produced immunity,” in part borrowed from French vaccin, masculine derivative of vaccine “cowpox, matter from cowpox pustules,” borrowed from New Latin or English
First Known Use: 1813See Words from the same year
VACCINE Defined for English Language Learners
Definition of vaccine for English Language Learners
medical : a substance that is usually injected into a person or animal to protect against a particular disease
VACCINE Defined for Kids
Definition of vaccine for Students
: a preparation containing usually killed or weakened microorganisms (as bacteria or viruses) that is given usually by injection to increase protection against a particular disease
History for vaccine
In the late 1700s the English doctor Edward Jenner investigated the old belief that people who contracted a mild disease called cowpox from cows thereby became immune to smallpox, a much more dangerous disease. Jenner documented 23 such cases, where people inoculated with matter from cowpox sores came down with cowpox but then did not contract smallpox. Because variolae vaccinae, literally, “cow pustules,” was the medical Latin name for cowpox, the virus-containing material used for inoculations eventually came to be called vaccine.
Medical Definition of vaccine
1: matter or a preparation containing the virus of cowpox used to vaccinate a person against smallpox
2: a preparation of killed microorganisms, living attenuated organisms, or living fully virulent organisms that is administered to produce or artificially increase immunity to a particular disease chicken pox vaccine; also : a mixture of several such vaccines measles-mumps-rubella vaccine
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