Some of the truckers driving around suburban Washington, D.C, have developed a cough while protesting coronavirus safety measures.

Participants in the so-called “People’s Convoy” have come down with symptoms resembling COVID-19 while taking part in a demonstration that started out as a protest against public health mandates aimed at preventing the spread of the coronavirus, reported The Daily Beast’s Zachary Petrizzo.

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“Today out in Hagerstown, more and more truckers with The People’s Convoy have complained about becoming sick with a bad cough,” tweeted Petrizzo, who has been covering the protest. “One streamer, ‘OTR Survival,’ ended up going to an urgent care, and described the illness as getting ‘hit by a bus.'”

While it’s not clear what illness the truckers actually do have, a cough is often a telltale symptom of COVID-19, and many sufferers also complain about feeling as if they have been hit by a bus, truck or some other large vehicle.