J Balvin Says COVID-19 Hit Him Hard, Urges Fans to Take It Seriously

J Balvin's urging his fans to take coronavirus seriously ... and he should know, 'cause he says he got it and the virus hit him HARD.

The reggaeton superstar revealed his diagnosis Thursday while accepting an award for his "Rojo" music video during Premios Juventud 2020 (think Teen Choice Awards). The Colombian singer -- in a pre-recorded message -- said he's just getting done with battling COVID-19 ... adding "sometimes we don't think we'll get it, but I got it and it hit me hard."

J Balvin -- who has collabed with hitmakers like Cardi B and Justin Bieber -- took advantage of the millions watching the broadcast to urge his fans to understand the virus is real and dangerous ... and treating the pandemic and precautionary measures as a joke can be a disastrous mistake.