When someone uses the term "Blood, Sweat, & Tears" we get the idea of hard work. For sure, if you work in Food Service you are WORKING HARD! I guarantee it. You will sweat, at least at some point. Tears? There are pounds/kilograms of onions to peel and prepare each day. Blood? Hopefully not! Unless you have agreed to be part of the ships blood bank for patients. Then I most definitely hope you get to give blood!
Mercy Ships has a unique blood donation system. They only use whole blood that contains plasma because they can’t separate it on the ship. The crew on-board the ship are literally a “walking blood bank” because there is no means of storing blood past 72 hours here on the vessel.
On the Africa Mercy they test every donor’s blood before the need arises. This allows the lab to call crew members immediately to start the process of donating blood.