It is unlikely that Disease X could cause a zombie outbreak. Disease X is a placeholder name for a hypothetical, unknown pathogen that could cause a global pandemic. While it is possible that Disease X could have some of the characteristics of a zombie virus, such as being highly contagious and causing death, it is unlikely that it would also cause the infected to become reanimated corpses.
The idea of a zombie virus is a popular trope in fiction, but there is no scientific evidence that such a virus exists. Additionally, there are many factors that would need to be in place for a zombie outbreak to occur, and none of those factors are currently present.
For example, a zombie virus would need to be able to reanimate dead tissue. This would require the virus to be able to reverse the process of death, which is a complex and poorly understood process. Additionally, the virus would need to be able to spread quickly and easily from person to person. This would require the virus to be highly contagious, like the flu or COVID-19.
While it is possible that a zombie virus could exist, it is highly unlikely that it would be able to cause a zombie outbreak. The chances of such an event happening are very slim.
However, it is important to note that the world is constantly changing and that new diseases are emerging all the time. It is possible that a new disease could emerge that has some of the characteristics of a zombie virus. If this were to happen, it is important to be prepared and to take steps to protect yourself and your loved ones.