What is the most logical next event?

How to survive a plague
Reduce rodent habitats around the home.
Plague is spread through populations of infected rats and the bites of fleas that use them as hosts. Eliminate possible nesting places for rodents in and around your home.
Tool sheds, brush piles, basements, garages and attics should all be checked for signs of infestation. Rat droppings are often a sign that rodents are nesting in or passing through your home.