Published in Hepatitis Weekly, June 17th, 1996
Hepatitis B surface antigen (HBsAg) and hepatitis B antibodies (anti-HBs) are measured by enzyme immunoassays (EIAs), radioimmunoassay, reversed passive hemagglutination assays (RPHAs), or passive hemagglutination assays (PHAs). Although EIAs and radioimmunoassays are widely used, they are also expensive and require complex instrumentation or radioisotopes, and the methods are too complex for emergency use. The RPHA and PHA methods are rapid and simple but they lack sensitivity and the results...
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