Prognosis: Misconception

Ventilators have become prized in hospitals across the U.S. and beyond because they are desperately needed to treat very ill Covid-19 patients. But they are also feared for the damage they can inflict, and for the slim odds of survival they offer. Michelle Fay Cortez and Olivia Carville report that it's not yet clear what the long-term consequences ventilators have for those lucky enough to recover after having been on one.

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As Covid-19 spreads, doctors are learning more about why some patients get very sick, and why others only get mildly ill. Some of the people most at risk for severe illness have underlying conditions that affect their lungs. Older people are also at a higher risk. But certain factors, when combined with age, create a powder keg for the effects of the disease. Both smoking and obesity are conditions that can lead to fatal results in Covid-19 patients. Bloomberg Senior Editor Jason Gale explains how these conditions have made the coronavirus more lethal in some countries.

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As states grapple with the question of when it will be safe to reopen businesses and relax social distancing, there's increasing urgency to better understand who's immune to Covid-19. Does having the virus and recovering mean you can't get it again, or at least that you can’t be reinfected for some time? No one yet has good answers to these questions. Kristen V. Brown looked into what we do, and don't, know about the science of coronavirus immunity.

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Iceland has become one of the best places in the world to study Covid-19. That’s because the country is an island nation with only one real port of entry and a small population. It also introduced widespread testing as soon as the virus arrived in March. Bloomberg reporter Kristen V. Brown traveled to Reykjavik, the capital, just as the global scale of the pandemic was starting to become clear. She reports that the rest of the world is learning from Iceland about how the virus moves through a population.

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The tedious and time-consuming practice of contact tracing is seen as an essential ingredient for suppressing the coronavirus around the world; but not every country has invested in it. The World Health Organization has praised Germany for its contact tracing practices. The country has about a quarter the deaths of neighboring France, despite a more flexible lockdown. Last weekend it continued its cautious move toward pandemic normalcy by letting restaurants re-open. Naomi Kresge reports on the Würzburg region, where armies of tracers are fighting the virus with old-fashioned tools.

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