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Fears grow of a coronavirus pandemic as markets stumble again; Japan shuts schools

As of early March, people have tested positive for the coronavirus in about 70 countries. Officials are taking "unprecedented" actions. (Video: The Washington Post)

U.S. markets fell sharply Thursday after the first coronavirus case in the United States that could not be linked to foreign travel was confirmed.

California is calling the case, first reported by The Washington Post, its first instance of community transmission. The hospital is monitoring the health of scores of staff members who may have come in contact with the patient.

The rapid spread of the novel coronavirus also raised the specter of a global pandemic as governments ramped up their emergency responses and international financial markets slumped again Thursday, despite signs that the outbreak may be easing in China.

Japan told schools to close through the spring break, which for most students typically means early April. Australia’s leader warned that a pandemic was inevitable, and an Iranian lawmaker said he has tested positive for the virus. New infections and deaths from covid-19, as the disease caused by the coronavirus is known, emerged from the Middle East to Europe and South Korea. The State Department, meanwhile, issued a Level 3 travel advisory for South Korea, portending extended economic disruption in Asia.

Coronavirus: What you need to know

Vaccines: The CDC recommends that everyone age 5 and older get an updated covid booster shot designed to target both the original virus and the omicron variant. Here’s some guidance on when you should get the omicron booster and how vaccine efficacy could be affected by your prior infections.

Variants: Instead of a single new Greek letter variant, a group of immune-evading omicron spinoffs are popping up all over the world. Any dominant variant will likely knock out monoclonal antibodies, targeted drugs that can be used as a treatment or to protect immunocompromised people.

Tripledemic: Hospitals are overwhelmed by a combination of respiratory illnesses, staffing shortages and nursing home closures. And experts believe the problem will deteriorate further in coming months. Here’s how to tell the difference between RSV, the flu and covid-19.

Guidance: CDC guidelines have been confusing — if you get covid, here’s how to tell when you’re no longer contagious. We’ve also created a guide to help you decide when to keep wearing face coverings.

Where do things stand? See the latest coronavirus numbers in the U.S. and across the world. In the U.S., pandemic trends have shifted and now White people are more likely to die from covid than Black people. Nearly nine out of 10 covid deaths are people over the age 65.

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