Acute bronchitis is somewhat contagious, mostly caused by viruses, bacteria, mycoplasma, or staphylococci due to inflammatory irritation. It can spread through respiratory secretions and expelled air containing pathogens. If a healthy person comes into contact with these pathogens, they may get infected. Therefore, acute bronchitis can be contagious. It is advisable to promptly disinfect indoor air, drink plenty of water, rest adequately, select sensitive antimicrobial drugs to kill the pathogens, and treat symptoms accordingly.