Study identifies antibodies isolated from individuals with seasonal flu vaccinations that neutralize H7N9 and other influenza strains. February 17, 2015. Antibodies that protect against H7N9 avian flu, which emerged in China in 2013 and sparked fears of a global pandemic, have been isolated in individuals who received seasonal flu vaccinations.
Yes, some types of squirrels live in trees. Both flying squirrels and species of tree squirrels make their homes in the tree canopy. This includes red squirrels, Eastern gray squirrels, Eastern fox squirrels, Douglas squirrels, Western gray squirrels and other species.
A favoured site for a drey is a tree crotch about 30 to 45 feet (9.1 to 13.7 m) above ground level. Squirrels may also nest in attics or exterior walls of buildings, where a drey may be regarded as a fire hazard, as some squirrels have a habit of gnawing on electrical cables.At other times, squirrels may inhabit a permanent tree den in the hollow of a trunk or large branch. drey is almost always at least 20 feet (6.1 m) above the ground, and flying squirrels build much higher. Sometimes squirrels build their own dreys and sometimes they occupy a vacant drey that was previously constructed by another tree squirrel, often of a different species.