SEAL OFF is a Manga/Manhwa/Manhua in english language, action series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.nl fastest updating comic site. The Summary is

Dong Cheng “White Horse Pharmaceutical” Daughter-in-law Zhuang Yanjing was invited to the Western Continent. ” High Class Technology Biological Research Base” The male protagonist, Zuo Xiang yang, is accompanied as a bodyguard. Unexpectedly, the two encounter an accident when they arrived at the research base. The research base was attacked by an unknown virus, everyone was infected and turned into zombies. Thus, Zuo Xiang yang led Zhuang Yanjing and the survivors on a difficult journey to escape from the research base…