Targeted memory reactivation improved memory performance of easy-to-learn words, but had no effect of difficult-to-learn words, which suggests a critical role of word learning difficulty in sleep associated memory reactivation.
Amanda C Perofsky, John Huddleston ... Cécile Viboud
Antigenic drift in influenza’s major surface proteins, hemagglutinin and neuraminidase, contributes to variability in epidemic magnitude across seasons but is less influential than subtype interference in shaping annual outbreaks.