In the last month, seven people ___ around the country from Crimean Congo hemorrhagic fever, which passes through tick bites.

Are both "died" and "have died" true or is there only one true option?

Have died is preferable, unles you know for certain that the fever is over and that there will be no more deaths.
YahyacanAre both "died" and "have died" true
True? I don't know. I wasn't there. If seven people really died, then it's true.

I suspect you're asking if the sentence is correct (grammatically).

Both died and have died are possible, but in the last month gives the impression of an amount of time during which now one now another person might have died, so I prefer have died. On the other hand, if they all died at the same time in the same incident, I would choose died.