"serums" in German serums Immunseren Seren Sera Detailed translations for "serums" serums serums(also: sera) Immunseren{masculine plural} serums(also: sera) Seren{masculine plural} Suppose the new serums don't work? Source: opensubtitles.org Corpus by OPUS Request review Angenommen, die neuen Seren funktionieren nicht? serums(also: sera) Sera{masculine plural}