This word has two distinct meanings. First, effervescence means
the property of forming bubbles; the bubbling of a solution due to the escape of gas. But it is the secondary definition of effervescence that makes it a "feel-good" word for me; that definition being--"having an appealingly lively quality or having a vivacious and enthusiastic personality."
I'd write "excellent"; we heard this often in the 60s; then as teen "tweet" in the 70s; then lost its cache; now we seldom do, although it is indicative of our front-line health care workers, I think...
#VegasStrong Phil Harris, actor and showman, to John Fogerty of CCR: “If I’d known I’d live this long, I’d have taken better care of myself.”