A virus broke out of a lab that caused anyone to get infected with it to become heavily pregnant and maternal with symptoms of a common cold. The symptoms are immediate.

It's like a regular virus or cold with symptoms like sneezing and a snotty nose. it's like a pandemic but instead of a deadly virus or disease as it's just a contagious pregnancy virus that gives a stereotypical pregnant body and symptoms with the added cold symptoms. no matter if your a man or woman but doesn't affect anyone under 18.

(Come up with a setting for you.)