How does marijuana affect the health of other people around you or near them?

Smoke of any kind can trigger asthmatic attacks in those susceptible, and cause other respiratory related problems.

There is no intoxication from second hand marijuana smoke, with the debatable exception of someone being in a very small closed in space that's thick with smoke. Even then there is very little chance of someone testing positive from second hand smoke, especially with thresholds present in common drug screening processes.