The US Centers for Disease Control reported several risk factors for severe complications and mortality from coronavirus infection including a weakened immune system, asthma, chronic obstructive pulmonary disease (COPD) and, unsurprisingly, cigarette smoking. It follows then that those with a history of chronic marijuana use may have an elevated risk of severe complications and even death from coronavirus if they become infected. Marijuana smoke causes inflammation in the airways and lungs that is nearly indistinguishable from that of cigarette smokers or people with bronchitis. Cigarette smokers have increased levels of angiotensin converting enzyme II (ACE-2) receptors that the corona virus [...]