No	Query	Results
#1	Search “vaccine management” or “vaccine stock management”	142
#2	Search “drug storage” and (vaccine or vaccines)	648
#3	Search “vaccine stock-out” or “vaccines stock-out”	3
#4	Search (vaccine or vaccines) and “supply chain management”	15
#5	Search (vaccine or vaccines) and “supply and distribution”	2521
#6	Search #1 or #2 or #3 or #4 or #5	3204