Vaccine Safety and Efficacy


For the past two centuries, vaccines have provided a safe and effective means of preventing several infectious diseases. Although the safety of some vaccines has been questioned in recent years, the currently available vaccines are more than a millionfold safer than the diseases they are designed to prevent. Vaccines, however, should always be used in conjunction with other public health interventions. Not only are some vaccines available via injection but other vaccines are also given orally or intranasally. New vaccines are being studied for topical and intravaginal use. Also, new systems are being developed for more efficient production of vaccines, especially for influenza. Vaccines are currently available for only a limited number of viral and bacterial diseases.


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