What does being “sick” mean?

If a human character’s health is reduced to zero as a result of a clash, he/she will become sick with the alien mind control. If a player becomes sick, he/she will have one day to track healthy diet and/or lifestyle items to recover some lost health or he/she will turn into an alien drone the following day. Note that if the invaders’ ferocity is at its maximum, human players may need to recover health AND escape the invaders the following day in order to avoid being turned.