Can exposure to wood fire smoke for one day (6-7 hours, was burning branches from landscape work) be a health concern?

Smoke exposure: A single exposure may not be fatal but smoke means exposure to carbon monoxide which competes with oxygen on RBC and can cause neurologic effects as well as death, and volatile hydrocarbons which can cause pulmonary /neurologic effects. When in the presence of smoke always have excellent ventilation and wear a mask ( R-95/99 that covers volatile hydrocarbons).