Nevertheless, the cold seems to have broken, and there's something going around, in addition to what I hear is a very intense and nasty yet mercifully brief stomach bug: vernalagnia! It's just another word for spring fever, whether a romantic, dreamy mood brought on by spring or a seasonal increase in sexual desire.
While I encountered both definitions in abundance during my research, the origins of vernalagnia seem more in line with the latter one, with verna, meaning "of spring," synonymous with vernal, and -lagnia, meaning "lust." I like to imagine a frustrated high school teacher hurling it at their students: You were my best-behaved class! Now you're just a bunch of vernalagniacs!