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WASHINGTON, D.C. — U.S. officials estimate that 20 million Americans have been infected with the coronavirus since it first arrived in the United States, with millions never knowing they had it.Thursday's estimate is roughly 10 times the 2.3 million cases that have been confirmed in the U.S.“Our best estimate right now is that for every case that we’ve reported, there were actually 10 other infections,” said the director of the Centers for Disease Control and Prevention (CDC), Robert Redfield, during a phone briefing with reporters Thursday. Redfield said that estimate comes from analyzing blood samples from across the country for the presence of antibodies to the virus.Twenty million infections means that only about 6% of the nation’s 331 million people have had the virus, leaving the vast majority of the population still susceptible.“This is still serious,” Redfield said. “But I’m asking people to recognize that we’re in a different situation today than we were in March or April,” with more cases today in younger people who are not as likely to develop serious illness or die from infection, he said.The news comes as the Trump administration works to tamp down nationwide concern about the COVID-19 pandemic at a time when about a dozen states are seeing worrisome increases in cases.Also on Thursday, the CDC announced that it was broadening its list of people who are at a higher risk of getting seriously ill from the coronavirus. The CDC has removed the specific age threshold for severe COVID-19 illness. It now warns that among adults, risk increases steadily as you age, and it’s not just those over the age of 65 who are at increased risk.The agency has also updated its list of underlying medical conditions that increase the risk of severe illness from the coronavirus. 1806

WASHINGTON (AP) — Responding to an outcry from medical experts, Food and Drug Administration Commissioner Stephen Hahn on Tuesday apologized for overstating the life-saving benefits of treating COVID-19 patients with convalescent plasma.Scientists and medical experts have been pushing back against the claims about the treatment since President Donald Trump’s announcement on Sunday that the FDA had decided to issue emergency authorization for convalescent plasma, taken from patients who have recovered from the coronavirus and rich in antibodies.Trump hailed the decision as a historic breakthrough even though the treatment’s value has not been established.Hahn had echoed Trump in saying that 35 more people out of 100 would survive the coronavirus if they were treated with the plasma. That claim vastly overstated preliminary findings of Mayo Clinic observation. 878

We now have VIDEO of that @RoyalAirForce reconnaissance flight over #iceberg #A68a. There are some mighty fissures, and the sea around the berg is littered with bits and bobs. Watchout South Georgia! ???? Read more: https://t.co/0hJP5fDdJ5 pic.twitter.com/MOWUWMuwZg— Jonathan Amos (@BBCAmos) December 8, 2020 323

WATCH ABC's 20/20 on ABC 10 at 10 p.m. Friday.Rebecca Zahau, girlfriend of pharmaceutical tycoon Jonah Shacknai, was found dead – hanging from the balcony of his Coronado home, completely nude, with her bare feet bound, hands tied behind her back and shirt stuffed in her mouth.Only two days before, Jonah’s six-year-old son, Max, had somehow fallen over a staircase banister in the same home and later died.Given the circumstances of her death, Rebecca’s family remains skeptical of the police ruling that her death was a suicide and alleges that Adam Shacknai, Jonah’s brother and the only other one staying at the property the night Rebecca died, is to blame and filed a wrongful death lawsuit against Adam.ABC News Senior Legal Correspondent Sunny Hostin reports on the story’s twists and turns. And in the midst of Rebecca’s family’s suit that went to trial this week, “20/20” features an exclusive first interview with Jonah about Rebecca and Max’s deaths. “20/20” airs on Friday, March 2 at 10 p.m. on ABC10. 1038

WASHINGTON, D.C. – Two different doses of a thyroid medication are being recalled because they're not potent enough.The Food and Drug Administration announced Thursday that Acella Pharmaceuticals is voluntarily recalling one lot of 15-milligram and one lot of 120-milligram NP Thyroid?, Thyroid Tablets.The products may have as low as 87% of the labeled amount of levothyroxine, which is used to treat hypothyroidism (an underactive thyroid), according to the FDA.The company’s risk statement says patients being treated for hypothyroidism who receive sub potent NP Thyroid may experience symptoms of hypothyroidism, including fatigue, increased sensitivity to cold, constipation, dry skin, puffy face, hair loss, slow heart rate, depression, swelling of the thyroid gland and/or unexplained weight gain or difficulty losing weight.“There is reasonable risk of serious injury in newborn infants or pregnant women with hypothyroidism including early miscarriage, fetal hyperthyroidism, and/or impairments to fetal neural and skeletal development,” wrote Acella. “In elderly patients and patients with underlying cardiac disease toxic cardiac manifestations of hyperthyroidism may occur, such as cardiac pain, palpitations or cardiac arrhythmia.”So far, Acella says it has received four reports of "adverse events" for these lot numbers, possibly related to the recall.The products subject to recall are packed in 100-count bottles. Their lot numbers are M327E19-1 and M328F19-3. And their expiration dates are Oct. 2020 and November 2020.The products were distributed nationwide to Acella’s direct accounts, including wholesalers, pharmacies, and health care offices.“Acella is proactively notifying its wholesalers by email and phone to discontinue distribution of the two above referenced lots being recalled and is arranging for return of all recalled products,” wrote the company.Anyone who is currently taking NP Thyroid from the lots being recalled should not discontinue use without contacting their health care provider for further guidance and/or a replacement prescription, according to Acella.Anyone with questions about the recall can email Acella at recall@acellapharma.com or contact a representative at 1-888-280-2044.Click here for more information. 2272