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We reviewed thrombocytopenia (TP) reports to the US Vaccine Adverse Event Reporting System (VAERS). We examined TP patterns for differences in single versus multiple immunization reports, presence of a live viral vaccine, seriousness, age, and interval to symptom onset. We found 1510 reports of possible TP and after exclusions evaluated 1440 for possible causes. Most (1078; 75%) met the regulatory...
We reviewed adverse events following receipt of inactivated mouse brain-derived Japanese encephalitis (JE) vaccine reported to the U.S. Vaccine Adverse Event Reporting System (VAERS) from 1999 to 2009. During this period, VAERS received 300 adverse event reports following JE vaccination (24 per 100,000 doses distributed); 106 (35%) were classified as hypersensitivity reactions (8.4 per 100,000 doses)...
Three vaccines currently recommended for adolescents (Tdap, Td, and MCV4 meningococcal conjugate vaccine) contain diphtheria toxoid. While the safety of individual diphtheria toxoid containing vaccines has been evaluated, less is known regarding the safety of administration of two or more of these vaccines, either concomitantly or sequentially. This study evaluated the risk of medically attended local...
In October 2003 the Advisory Committee on Immunization Practices (ACIP) recommended influenza vaccination for all children ages 6–23 months. We evaluated the safety of this recommendation by querying the Vaccine Adverse Events Reporting System (VAERS) for serious adverse events (SAE) reported between July 1, 2003 and June 30, 2006 in 6–23 month old infants after trivalent inactivated influenza vaccine...
On October 20, 1997, the U.S. Food and Drug Administration (FDA) licensed Purified Chick Embryo Cell (PCEC, RabAvert ® ) vaccine against rabies in humans following clinical trials demonstrating safety and efficacy. From October 1997 through December 2005, the Vaccine Adverse Event Reporting System (VAERS) received 336 reports of adverse events (AEs) following vaccination with PCEC vaccine...
The preparation of recombinant hepatitis B vaccines involves using cellular cultures of Saccharomyces cerevisiae, otherwise known as baker's yeast. Prior to vaccine licensure, clinical trials were performed to address whether residual yeast proteins in the vaccines could induce anaphylaxis, including testing for IgE anti-yeast antibody levels. 1–2% of subjects had anti-yeast IgE antibodies before...
Therapeutic decisions made by Emergency Physicians are often influenced by which prescribed medications are being taken by patients. We sought to assess Emergency Department (ED) patients’ knowledge of their medications by using a survey. A convenience sample of adult ED patients was surveyed verbally by a research assistant. Two-hundred patients were enrolled. Only 48% of patients could recall or...
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