By carlyo on November 4, 2014.
The ‘Nifty Fifty (times 4)’, a program of Science Spark, presented by InfoComm International, are a group of 200 noted science and engineering professionals who will fan out across the Washington, D.C. area in the 2014-2015 school year to speak about their work and careers at various middle and high schools.
Meet Nifty Fifty Speaker Karen Elkins
Vaccines against diseases such as measles, polio, and whooping cough have greatly reduced deaths and suffering. These vaccines are designed to mimic the microbes that cause the disease. When given a vaccine, the body s immune system is inspired to ramp up and fight back against that microbe. As a result, immune defenders are ready and waiting when the real thing later starts an infection.