Video above: Smokers at greater risk of contracting COVID-19, researchers sayDr. Kathryn Hibbert’s COVID-19 patient in the intensive care unit was not doing well. As his blood pressure plummeted, she tried to insert an intravenous line into an artery in his wrist.A blood clot clogged the tubing.Frustrated, Hibbert tried again with a new needle. A blood clot clogged up that line as well.It took three