Hi Susan,
I have no special medical knowledge over any other average guy, but living in a country in which dengue fever and other type of hemorrhagic fevers are unfortunately common, I can tell you that taking any kind of anti-coagulant is not recommended in case you suffer of fever and common flu symptoms.
In facts here Aspirin is a controlled medication while almost any others are over the counter, including any kind of anti-biotics.
My 2 cents.