Infected shared hosting

My website got hacked on a shared hosting. I resolved it by deleting all files and re-uploading them and then making it more secure. but I got an email from my hosting server that several files on another website on my shared hosting is infected. how should I proceed ?
 
The hosting provider and the respective website owners are responsible for their own environments IMO.

When you were giving access to the shared host the first time, the directory permissions should have been set appropriately to avoid this as well as to inhibit cross-site infections.
 
Back