1. Humidity control. Yes for packed medicines, no for vaccines packed in glass and impervious materials. Our refrigerators are running commonly at high 80s rh and the only worries we have are related to running condensation (labels lost, etc.). But no regulation that we adhere to on humidity and no control mechanisms exist in our equipment either.
2. The best places to look for this material are as follows:
Training for mid-level managers (MLM) > Module 1. Cold chain, vaccines and safe-injection equipment management
www.who.int/immunization/documents/mlm
"Module 1 helps the mid-level manager determine how much vaccine and safe injection equipment is needed to run an immunization programme, how to manage its storage, distribution and replacement, how to monitor the system, and how to respond to changes when a new vaccine is introduced."
EVM Standard Operating Procedures (SOPs) > E6-6.1 Storing vaccine and water packs in refrigerators and freezers
http://www.who.int/immunization/programmes_systems/supply_chain/evm/en/index2.html
"Storing vaccine and water packs in refrigerators and freezers"