You are most certainly technically incorrect, which is the worst kind of incorrect. It would take very very high levels of ozone to be anywhere near as promptly fatal as carbon monoxide poisoning from running a gasoline powered car inside a closed garage. As far as I know, no one commits suicide by running an electric motor in a closed room. Ozone causes oxidative damage to tissues, including the delicate tissues of your lungs. Carbon monoxide shuts down the oxygen carrying function your hemoglobin. You can be killed by unnoticeable levels of carbon monoxide. It's highly unlikely you won't be able to sense dangerous levels of ozone. In fact, it's likely to be unpleasant enough to drive you from the room. Whereas CO makes you feel sleepy as you slip down to unconsciousness forever.
(EDIT: That said, ozone in rather small amounts can be quite damaging to long term health.)
It is plainly obvious that CO and even CO2 from IC engines is drastically more fatal than anything coming out of an electric motor...I thought the trolling attempt was transparent, but apparently not. If I really wanted to provide a counter to the article, pollution from battery manufacturing is far more concerning than ozone (which has a half life measured in days) from brushed electric motors. And even that appears to be far less of a problem than the carbon economy.
That being said, ozone can be fatal over the long term, and researchers regularly segment pollution death estimates to include ozone pollution [1].
(EDIT: That said, ozone in rather small amounts can be quite damaging to long term health.)