Humans
| County | city | Age Range | Onset Date | Virus Result | Clinical Presentation |
|---|---|---|---|---|---|
| Plymouth | 60 - 69 | 8/4/2019 | EEE | Encephalitis | |
| Worcester | 20 - 29 | 7/30/2019 | EEE | Meningitis | |
| Hampden | 70 - 79 | 8/16/2019 | EEE | Encephalitis | |
| Bristol | 50 - 59 | 8/10/2019 | EEE | Meningoencephalitis | |
| Middlesex | 70 - 79 | 8/31/2019 | EEE | Meningoencephalitis | |
| Worcester | 60 - 69 | 9/1/2019 | EEE | Meningoencephalitis | |
| Middlesex | <18 | 9/1/2019 | EEE | Encephalitis | |
| Middlesex | 60 - 69 | 9/1/2019 | WNV | Meningoencephalitis | |
| Bristol | 50 - 59 | 9/6/2019 | EEE | Encephalitis | |
| Essex | 70 - 79 | 9/9/2019 | EEE | Encephalitis | |
| Plymouth | 50 - 59 | 9/4/2019 | WNV | Fever | |
| Bristol | 70 - 79 | 9/12/2019 | EEE | Encephalitis | |
| Worcester | 70 - 79 | 9/12/2019 | EEE | Encephalitis | |
| Hampden | 70 - 79 | 9/15/2019 | EEE | Encephalitis | |
| Middlesex | 60 - 69 | 9/15/2019 | WNV | Fever | |
| Bristol | 60-69 | 9/18/2019 | WNV | Fever | |
| Plymouth | 50-59 | 9/20/2019 | WNV | Meningitis |