Sent_en: 2khm This novel variant may have become dominant ... because it was not as easily affected as other strains by the avian vaccine used to prevent H5 infection.
Sent_yy: មេរោគថ្មីនេះ​ប្រហែលជា​ខ្លំាង...ពីព្រោះ​វាមិន​ងាយងាប់​ដូចមេរោគ​ផ្សេងទៀត​ដែលប្រើ​វ៉ាក់សាំង​ការពារ​ពីការឆ្លង H5​។