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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

Thirteen days before the 2020 presidential election, former President Barack Obama arrived on the campaign trail in the Keystone State of Pennsylvania on Wednesday to lend a hand to his former Vice President Joe Biden.The stalwart and arguably most popular figure of the Democratic Party is hoping to lend his esteem among Democrats to push them to the polls for Biden. Opinion polls are showing a slight lead for Biden in Pennsylvania, and the state could end up being the keystone to reaching 270 Electoral College votes.Obama delivered a fiery rebuke of President Donald Trump, going after his leadership amid the coroanvirus pandemic, and his plans to eliminate the Affordable Care Act. "Where is this great plan to replace Obamacare? They’ve had 10 years to do it. There is no plan," Obama said. Pennsylvania played an important role in 2016 in sending Trump to the White House; Trump won the state by .6%. Trump was the first Republican presidential candidate to win the state since 1988, but the state has been hotly contested in tight elections. In 2004, John Kerry won Pennsylvania by just 2%, while Al Gore won the state by 4% in 2000.The former president had approval ratings well above those of Biden and Trump when he left office. In January 2017, Obama had a 59% approval rating nationally, according to Gallup. A year later, Gallup conducted a retrospective job approval rating, which gave him a 63% approval rating. By comparison, Trump has a 43% approval rating, according to Gallup; Biden has a 46% favorability rating.Due to the coronavirus, Wednesday’s rally was a drive-in, with supporters socially distanced.Joining Obama was a number of prominent Philadelphia-area Democrats, including Gov. Tom Wolf.Obama’s visit to Philadelphia comes less than 24 hours following Trump’s stop in Erie, Pennsylvania.The Biden campaign announced late Wednesday evening that Obama will once again be back on the campaign trail on Saturday with a visit to Miami.While Biden took the day from the campaign trail to prepare for Thursday's debate, Trump campaigned in North Carolina. 2093

TOKYO — Shinzo Abe, Japan’s longest-serving prime minister, says he will resign because a chronic illness has resurfaced. Concerns about Abe’s health began this summer and grew this month when he visited a Tokyo hospital two weeks in a row for unspecified health checkups. Abe has acknowledged having ulcerative colitis since he was a teenager and has said the condition was controlled with treatment. Abe, whose term ends in September 2021, is expected to stay on until a new party leader is elected and formally approved by the parliament.Abe's resignation will mark the end of his second term. He served as prime minister from September 2006 to September 2007 before resigning due to health problems. He assumed office for his second term in December 2012. 767

This June 24, 2020 image is from the Suomi NPP OMPS aerosol index. The dust plume moved over the Yucatan Peninsula and up through the Gulf of Mexico. The largest and thickest part of the plume is visible over the eastern and central Atlantic. 250

Three men have been punished after they allegedly put whole chickens into a thermal feature in Yellowstone National Park.It happened on August 7, 2020.Eric K. Romriell of Idaho was found guilty of violating 36 CFR 7.13(j) Foot travel in thermal area, and 36 CFR 1.5(f) Food in thermal area. He was ordered to pay ,250 in fines and fees, banned from entering Yellowstone National Park for two years, and placed on unsupervised probation for two years.Eric D. Roberts and Dallas C. Roberts of Utah were found guilty of violating 36 CFR 7.13(j) Foot travel in thermal area. Both were ordered to serve two days in jail and pay 0 in fines and fees. They were also banned from entering Yellowstone for two years, and placed on unsupervised probation for two years.The Yellowstone National Park website provides the following information about safety around thermal features:Always walk on boardwalks and designated trails. Keep children close and do not let them run on boardwalks.Do not touch thermal features or runoff.Swimming or soaking in hot springs is prohibited. More than 20 people have died from burns suffered after they entered or fell into Yellowstone’s hot springs.Pets are prohibited in thermal areas.Do not throw objects into hot springs or other hydrothermal features.Toxic gases may accumulate to dangerous levels in some hydrothermal areas. If you begin to feel sick while exploring one of our geyser basins, leave the area immediately. 1462

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