"Raw" refers to the original Japanese scans. These are typically available on Japanese digital storefronts or through community scanlation groups that translate them for international readers.

This manga is often compared to other "hedonistic" zombie survival stories, such as:

While the search for "free" content is common, supporting the original creators ensures the story can continue. Many Japanese platforms offer the first few chapters for free to entice new readers.

Ore no Vaccine dake ga Zombie-ka shita Sekai wo Sukueru Vol.1-4. Japanese language comic books.

Ore No Vaccine Dake Zombie Ka Shita Sekai Sukueru 1 Japanese Comic