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malaria |
The word malaria |
"CDC" |
The word CDC (Enclose words like CDC in quotes) |
malaria, infectious, HIV |
Any of malaria, infectious,
or HIV, ranked in the same order |
infectious AND disease |
The words infectious and disease |
infectious OR disease |
Either the word infectious or disease |
infectious NOT disease |
The word infectious, but not the word disease |
infect* |
Words beginning with infect |
"leading cause of death" |
The entire phrase leading cause of death |