The newly discovered virus is named G4 and originated from the H1N1 strain which caused a pandemic in 2009.
ໄຂ້ຫວັດຫມູສາຍພັນໃຫມ່ມີຊື່ວ່າ G4 ມີສາເຫດມາຈາກ ຢີນ (gene) ຈາກສາຍພັນ H1N1 ທີ່ເຄີຍເກີດຂຶ້ນແລ້ວໃນປີ 2009.