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To end the pandemic, there need to be enough people immune to COVID-19 and there are two ways to do that: immunity through infection or from a vaccine."I think racing to herd immunity is the dangerous thing that I’m concerned about," said Dr. Stuart Ray, a professor of medicine at Johns Hopkins University School of Medicine.Herd immunity is when the spread of the infection cannot be sustained because the number of people who are immune is high enough. Some countries are considering it as a strategy to combat COVID-19.But Ray said it could not work in the US unless much more effective treatments are developed.He says on average, a newly infected person infects two others, so to have herd immunity from COVID-19 about 60 percent of people would have to become immune."We would have something like another 100 million people, maybe more, infected. 150 million more and even if the major complication rate is a fraction of 1 percent, we will still have huge numbers of deaths," said Ray.He said we also don’t know if just having had the infection once will create lasting immunity to control the spread."It possible that you could be immune enough not to get sick and still not immune enough to prevent that spread and so herd immunity is a tough bar for us to aim for because not only do we need 60 percent of people to be immune but we need them to be immune in a way that prevents them from infecting other people," said Ray.The other way to achieve herd immunity would be through a vaccine."Vaccines can work better, provide better immunity than the natural infection does. The new shingles vaccine provides great immunity and protects more than 95 percent of people from getting shingles," said Ray.Several vaccines are still going through the last phase of clinical trials to see if any also creates enough immunity to prevent passing the virus along.This story was first reported by Abby Isaacs at WMAR in Baltimore, Maryland. 1946

Thomas Lane, one of the four former Minneapolis officers arrested in connection with the death of George Floyd, posted bail on Wednesday according to jail records.Lane was among the three officers who were charged with aiding and abetting a murder. The fourth officer, Derek Chauvin, was charged with murder.Lane's bail was set at 0,000 following his arrest last week.Lane was on his fourth day with the Minneapolis Police when Floyd died in his custody. The four officers were fired one day after Floyd’s death.Floyd died after Chauvin held a knee to Floyd’s neck for nearly nine minutes. 600

THOUSAND OAKS, Calif. (KGTV) - The Ventura County Sheriff’s Department detailed the circumstances leading deputies to search Tuesday the Thousand Oaks home of actress Heather Locklear.The actress was arrested at her home February 25 on suspicion of felony domestic battery and three counts of battery on a peace officer.Locklear told deputies she would shoot them if they ever came to her house again, investigators said.According to the search warrant, deputies looked for a firearm Locklear has registered in her name but did not find it on the property.Locklear is scheduled to appear in court March 13. 614

Trade war fears and a presidential attack on Amazon are rocking Wall Street.The Dow dropped more than 700 points on Monday, and the Nasdaq plunged 3%. The S&P 500 hit its low for the year and was on track for its lowest close since November. The sell-off left all three major indexes in the red for 2018.By the end of the day Monday, the Dow slightly recovered, closing down 458 points for the day.The sell-off on the first day of the second quarter came after President Trump once again attacked Amazon on Twitter. Amazon, one of the biggest drivers of the 2017 market rally, tumbled 5%, wiping out more than billion of its market value.Trump once again accused Amazon of taking advantage of the US Postal Service, and he suggested that Amazon does not pay its fair share of tax.In fact, Amazon pays the same lower rate that the post office charges other bulk shippers, and it collects sales tax in every state that charges it. Amazon does not collect sales tax on purchases made from third-party vendors."You've got the president of the United States attacking a single company over what he considers to be unfair practices," said Ian Winer, head of equities at Wedbush Securities.Amazon wasn't the only tech stock in trouble. Tesla, Netflix and Cisco all dropped by at least 4%. Intel plunged 8% on a?Bloomberg News report that Apple plans to switch to its own chips. Almost every stock in the Nasdaq 100 lost ground.The Nasdaq has plunged more than 10% from its all-time high on March 12."When investors see market leaders suddenly stumble, they become more cautious about the entire group," said Kate Warne, investment strategist at Edward Jones.Wall Street is also fretting about rising trade tensions, especially with China. Beijing responded to Trump's steel and aluminum tariffs on Monday by following through on its threat to impose tariffs on billion of US imports. The tariffs apply to 128 products, ranging from pork and meat to steel pipes.Trump plans to place additional tariffs on about billion worth of Chinese goods — and Beijing has promised to respond.John Toohey, head of equities at USAA, blamed the sell-off on concerns about the China tariffs. "Global trade could slow down, global supply chains could be impacted, and CEOs could be more cautious on capital spending," Toohey said.NAFTA worries are also on the rise after Trump took aim at the trade deal between the United States, Canada and Mexico. Trump on Sunday linked NAFTA to his efforts to build a wall along the border with Mexico."They must stop the big drug and people flows, or I will stop their cash cow, NAFTA. NEED WALL!" Trump tweeted."It's a cause for concern. That mixing of issues is contributing to uncertainty," said Kristina Hooper, chief global market strategist at Invesco.No matter the cause, signs of fear abounded. The VIX volatility index jumped more than 15%. CNNMoney's Fear & Greed Index of market sentiment dropped further into "extreme fear." Crude oil plunged about 3%. Gold, which tends to do well when investors are worried, climbed more than 1%."None of it makes a lot of sense," said Michael Block, chief strategist at Rhino Trading Partners. "I don't know what we learned that was new. Chinese tariffs are not surprising."After spiking last year, the stock market hit extreme turbulence during the first three months of the year as investors worried about tariffs, inflation and tech stocks. The Dow snapped its longest quarterly winning streak in 20 years.Stocks may be volatile, but the backdrop looks bright. Global economic growth is expected to accelerate and corporate profits are likely to surge, thanks in part to Trump's corporate tax cuts."It's unlikely to be the end of the bull market," Warne said. "The underlying fundamentals remain positive." 3823

This week countless photographs have offered close-up depictions of the destruction caused by California wildfires. Now, with the help of its satellites, NASA has released pictures giving a different perspective.NASA's Landsat 8 satellite captured this first image of the Camp Fire on the morning of November 8, just a few hours after the blaze had broken out. That fire grew quickly, torching 20,000 acres in less than 14 hours. At one point, it grew by a average of more than one football field every three seconds.The fire in the picture is highlighted, and beneath that smoke the flames are encroaching on the northern California community of Paradise, where it's estimated that up to 90% of homes have been destroyed.The second image, captured by NASA's Terra satellite, gives a better sense of the scope of the Camp Fire in relation to the state. Smoke from the blaze obscures a wide swath of the northwestern part of the state, stretching south from Paradise to just north of San Francisco. 1005

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