Snot Zombie

A person who, caught unaware and unprepared, has sneezed, coughed, or otherwise covered themselves in mucus, and is walking towards someone or something that can help them.

As they usually have outstretched arms, grasping for a facial tissue, they resemble a Zombie.

"Joe must have a cold. He ran out of the meeting as a snot zombie."

"Amy! Cover your face when you sneeze! You just turned your brother into a snot zombie!"