Amino Acid Polymorphisms in the Basic Region of Meq of Vaccine Strain CVI988 Drastically Diminish the Virulence of Marek's Disease Virus. - Sato J; Motai Y; Yamagami S; Kurokawa A; Win SY; Horio F; Saeki H; Maekawa N; Okagawa T; Konnai S; Ohashi K; Murata S (Viruses, 2025)