| http://www.w3.org/ns/prov#value | - Domestic ducks, which constitute an important part of poultry in many Asian countries including Vietnam, have been recognized as one of the primary factors in the spread of H5N1 HPAI. In this study, we examined the efficacy of two vaccines used in Vietnam to protect ducks against H5N1 HPAI. Three experiments were conducted using the commercial inactivated Re-1 and Re-5 vaccines to vaccinate ducks
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