Ore no vaccine dake ga zonbi-ka shita sekai o sukueru is a Manga/Manhwa/Manhua in english language, Adventure series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

Oikawa Yuu, who has been shut up in his house, is certain to die as a virgin at the age of 21. This is because the whole world has become a place filled with zombies... One day, a survivor visits Yuu's house. The woman, who calls herself Sunny, injects Yuu with a vaccine that may save the world from the zombies... but as a result, Yuu gains the ability to turn zombies back into humans by having sex...?