Streptococcus pneumoniae bacteria, also called pneumococcal bacteria, are one of the leading causes of illness in young children. They can cause pneumonia, bloodstream infections, meningitis, sinusitis, and middle ear infection. More
Systems for developing and testing vaccines emerged after the 19th century, when many vaccines began to be used. The current system for developing, testing, and regulating vaccines developed during the 20th century as the groups involved standardized their procedures and regulations. More
Vaccines are made using several different processes. They may contain live viruses that have been attenuated (weakened or altered so as not to cause illness); inactivated or killed organisms or viruses; inactivated toxins (for bacterial diseases where toxins generated by the bacteria, and not the bacteria themselves, cause illness); or merely segments of the pathogen (this includes both subunit and conjugate vaccines). More
Which three researchers were in a race to develop a polio vaccine?
Albert Sabin, David Bodian, and Jonas Salk
Maurice Hilleman, Hilary Koprowski and Jonas Salk
David Bodian, Albert Sabin, and Maurice Hilleman
Jonas Salk, Albert Sabin, and Hilary Koprowski
Jonas Salk, Albert Sabin, and Hilary Koprowski all worked on polio vaccine development. Salk's inactivated vaccine was licensed in 1955.