Many of the dead seals that washed ashore in northern New England in the past few weeks tested positive for either avian influenza or phocine distemper virus, but it is still too soon to say if those viruses are the primary causes of the unusual die-off.
Preliminary results suggest that avian flu and/or phocine distemper virus may be contributing to the elevated seal strandings in Maine, New Hampshire, and Massachusetts since June 1, 2018.
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