You have 75 Armed Forces members being stationed in Southeast Asia who are going to the vaccine administration site to receive an injection of typhoid vaccine. While administering these injections, you want to maintain the correct temperature in the vaccine storage unit and ensure that the typhoid vaccine is effective when you administer it. Which option best safeguards both the vaccine you are going to administer and the temperature in the vaccine storage unit?
1) Using a temperature monitoring system to ensure the vaccine storage unit stays within the recommended temperature range
2) Administering the vaccine immediately after removing it from the storage unit
3) Keeping the vaccine storage unit in direct sunlight to maintain the temperature
4) Storing the vaccine in a refrigerator at a temperature below freezing point