Hamilton was responding to news coverage showing scenes of crowds gathering worldwide, despite advice from their governments.
"I'm so sad to hear of the amount of deaths happening around the world," Hamilton wrote on social media. "I know most of us are limited with the knowledge of why and how this has happened.
"There is nothing we can do about it either way except to try to isolate ...Keep reading
Read more: Hamilton slams "irresponsible, selfish" people amid pandemic - Motorsport.com