Lyle Petersen
Lyle Petersen
virus
The virus is here and it's going to stay.
epidemic north virus west
The North American West Nile virus epidemic persists.
call endemic entering
We are entering a new phase, and we can call it the endemic phase.
avoid becoming case human importance reminds taking virus west
This season's first human case of West Nile virus reminds us of the importance of taking precautions to avoid becoming ill.
epidemic
We're still on the upslope of the epidemic curve.