What you need to know about coronavirus on Tuesday, May 12

A: When the government scrambles to restart the economy, one way to get people back to work is to get support: an antibody test. The hope is that those who have been infected may have developed enough antibodies to make them invulnerable – get them back to work safely – even though this knowledge is far from settled. But experts warn that going down this route can create new problems, including discrimination at work, or people who deliberately try to get infected so they can get back to their work faster, “playing Russian roulette” with their lives, as said by a doctor.

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While officials are now required to wear face masks in the West Wing, Trump, who says he cannot imagine wearing a mask in public, may be less likely to do so. The First Lady, on the other hand, has been wary of practicing social distance and wearing a mask, and has asked staff in the East Wing to do the same.

Elsewhere, masks have become an important part of the reopening strategy. They are now required in the Paris metro system, after France began lifting the key yesterday. Across the Straits, Britain has recommended that masks be worn on public transportation, due to some lifting restrictions – but they are still not mandatory.

If Trump needs to remind how easily the corona virus can spread at work, he just needs to pick up the phone and call his friend Boris Johnson, Luke McGee writes. The British Prime Minister knew firsthand the pain of Covid-19, after surviving a serious virus attack that left his government in control at the worst possible time.

South Korea, China and Germany – countries where home stay measures and other restrictions have recently been lifted – have reported spikes in infection. In the past 24 hours, Germany has recorded more than 900 new cases.

“Over the weekend we see signs of challenges that may lie ahead,” said WHO Director General Tedros Adhanom Ghebreyesus, referring to the surge in cases in three countries. Tedros added that the uptick is a sign that, without vaccines, strict social distance measures must continue.

• Twitter says it will brand coronavirus tweets that are misleading – even if it’s from Trump.
• Tesla CEO Elon Musk has stepped up his stand with California officials, announcing the automaker will continue production and oppose locking orders.
• NFL games can be the perfect storm to spread viruses – even without fans – Dr. Fauci warned.
• Around the neighborhood police patrol. Army uniforms stand guard at checkpoints. Breaking up quarantine can mean jail time for tourists in Hawaii.
• Winter antibodies, llamas on agriculture managed by the University of Ghent in Belgium, can be very important in neutralizing Covid-19.
• “Go to work. Don’t go to work. Go outside. Don’t go outside.” Comedian Matt Lucas took aim at Boris Johnson, parodying some of his appointments by order to stay at home in England.
• A fire in a Russian hospital has killed five coronavirus patients. The fire may have been caused by a malfunctioning ventilator, the state news agency reported.

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There is no more cafeteria. Alternative bell schedule. Online class. CNN Chief Medical Correspondent Dr. Sanjay Gupta talked with McMorris-Santoro about what the new school day was like. Listen now