Different Types of Vaccines

WHO via Images from the History of Medicine (NLM)
Preparation of measles vaccine
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

Top 20 Questions about Vaccination

Detailed answers to those most frequent questions about vaccination. More

Vaccines for Pandemic Threats

Vaccination will likely be part of a multi-faceted public health response to the emergence of a pandemic illness.Not all disease threats, however, have a corresponding vaccine, and for those that do, there are significant challenges to their use in a pandemic. More

Misconceptions about Vaccines

Misconceptions about vaccines have persisted for decades because of a poor understanding of how vaccination works and an often skewed notion of the human immune response. More

Pertussis ( Whooping Cough )

Pertussis, also known as whooping cough, is an extremely contagious disease caused by the Bordetella pertussis bacterium. More

Cultural Perspectives on Vaccination

Given the global presence of vaccination, many cultures have responded differently, with some embracing such public health mandates and others wary of vaccines that contradict their religious beliefs or sense of individual rights. More

History of Smallpox

One of the deadliest diseases known to humans, smallpox is the only disease to have been eradicated by vaccination. More

Debunked: The Polio Vaccine and HIV Link

In the 1990s, journalist Edward Hooper wrote a book claiming that an oral polio vaccine had been the source of the HIV/AIDS epidemic. Evidence does not support his conjecture. More


Measles is an extremely contagious disease caused by a virus from the paramyxovirus family and spread by air. More