No, humans cannot breathe on Mercury.
Constellations, the Sun, and Black Holes
Control Your Urge to Breathe While Freediving
Mercury
50 years ago, the first probe to visit Mercury launched
Are there any planets that have air for the US to breathe? - Quora
Space medicine isn't just for astronauts. It's for all of us - CNET
BRAND NEW, Swatch X Omega Bioceramic MoonSwatch: Mission to Mercury (SO33A100)
Does Mercury have an Atmosphere?
Mercury — A complete guide to the closest planet to the sun
What Underwater Habitats Are Teaching Us About Spacecraft and Exploration
Could we breathe in Saturn's atmosphere? - Quora