We have a flea problem in our house. Can you help us by answering the
following questions so we can combat the problem?:

1. Are there human fleas versus cat/dog fleas, someone told me that cat/dog
fleas cannot reproduce by biting humans--they need cat/dog blood. Is this
true? If so, how can we tell whether we have human or cat/dog fleas? Since
we have no pets, I am hoping we have cat/dog fleas and that they will die
out on their own.

2. Is Borax toxic to humans?

3. Once a flea comes in contact with Borax, how long does it take to die?

Thanks in advance.