Hard frost
A hard frost has now occurred in all communities across the state. People are no longer at risk of mosquito-borne illness in Massachusetts in 2019.
Routine mosquito testing is typically reported June-October. DPH will conduct early season surveillance activities to assess the risk of WNV and EEE in 2020.
2019 Arbovirus results summary
| Mosquito samples positive | Animals positive | Humans positive | |
|---|---|---|---|
| WNV | 87 | 0 | 3 |
| EEE | 428 | 9 | 12 |
| Last updated: | November 14, 2019 |
|---|