Even in normal times, public transportation is an easy place to get sick: Commuters jostle each other, breathe the same air in packed subways, grasp the same straps for support and grab the same escalator handrails.
In times of coronavirus, though millions of people are staying home from school or work, those who must continue to use trains, streetcars and buses are doing what they can to minimize the risk.
From Mexico City to Mumbai and New York to Barcelona, commuters who can get their hands on face masks rely on them for protection. Some use tissues or handkerchiefs to grasp subway poles that have been touched by untold numbers before them. When possible, passengers try to sit at a distance from each other.
Transportation authorities are also trying to keep commuters safe. In Rio de Janeiro, soldiers clad head-to-toe in bright yellow protective suits stand in formation on a platform before disinfecting rail cars. And in Medan, Indonesia, a worker walks through a car spraying clouds of disinfectant.
Around the world, commuters are surely hoping for a return to the times when their biggest transportation concern was whether their ride arrived on time.