"The objection to the adverb "real" is that it is informal, and better suited to speech than to writing. Some have gone so far as to object to "real" as an adverb entirely. This is one of those nineteenth-century grammatical shibboleths that is largely ignored in practice, and rightly. True, the adverbial "real" is perceived—by some—as less formal than "really," but it is not incorrect. It has a long history of usage, both spoken and written, and is perfectly standard English.
"Real," as an adverb, is a simple amplifier, similar to "very." The adverb "really" is more nuanced; it might mean "very" (he is really angry) or it might mean "actually" (he is really angry). In general, however, "really" is more often used to mean "actually" than "very." Whether "real" is the appropriate adverb depends on the intended meaning."
https://painintheenglish.com/case/4398/Think of how stupid the average person is, and realize half of them are dumber than that.
~George Carlin~
Vaccines 
