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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

Today would be a normal drive to work for Amelia Caceres — except her house is surrounded by police tape. Adrian Perez helped her get out, both still in shock after hearing the brand new bridge outside their home collapsed."We were some of the first people on the front,” Caceres said. “And we saw the cars crushed underneath it was really horrifying, so it was really scary.”“My mind just does not captivate that that happened,” Perez said.Caceres and Perez saw the scene unfold, in disbelief. “It’s kind of like surreal,” Perez said. “Like it was a movie. There was a woman — I guess that she was trapped in the car like under the car .. she was crying hysterically. It was just really strange.”What made it even more strange for these two is that they had just watched the bridge go up days before.“It was just up. It was done,” Caceras said. “And it seemed almost like it was amazing that they had done it so quickly.”The bridge was designed to provide a safe way for students at Florida International University, like Perez, to cross a busy highway."I was really excited about this bridge because I was like finally I won’t have to go through the death trap that is eighth street crossing," Perez said. "Now, that’s kind of ironic."Carlos Devarona lives less than a mile away, and travels the street every day.“You have a blind faith in construction,” Devarona said. “You never think something like this is going to happen.”Watching the scene left him with even more questions, specifically why officials chose to perform a stress test in the moments before the collapse. “Not above live traffic  — you don’t do that,” Devarona said. “It just should never happen.”As investigators work to answer the many questions surrounding the collapse, Perez and Caceras, like so many others, wait for answers.“I’m sure that they did what was needed to get done,” Perez said. “I don’t think anyone would do something like this purposefully. Or negligently. I guess we will see.” 2034

TRAVERSE CITY, Mich. (AP) — A federal grand jury has indicted six men on charges of conspiring to kidnap Michigan Gov. Gretchen Whitmer.In October, the men were arrested in what authorities describe as a plot by anti-government extremists angry over the Democratic governor's policies to prevent the spread of the coronavirus.U.S. Attorney Andrew Birge announced in a statement that the indictment was handed down Wednesday.According to an indictment released Thursday, Adam Fox, Brandon Caserta, Ty Garbin, Kaleb Franks, and Daniel Harris, all of Michigan, and Barry Croft of Delaware, allegedly began to plan the kidnapping last summer.According to the indictment, they allegedly conducted surveillance of Whitmer's rural vacation home and practicing the use of firearms and explosives.On August 23, Garbin, Franks, and Caserta met up with Harris near his residence in Lake Orion, Michigan, to examine each other’s identification documents to make sure they weren't undercover law enforcement agents or informants, according to the affidavit.WXYZ reports that federal agents were infiltrated among the group as either confidential informants and undercover FBI agents.According to the indictment, Fox ordered ,000 worth of explosives from an undercover agent in September.Fox also ordered a taser in October, WXYZ reported. Fox was also photographed at the governor's summer home drawing a map of the property.According to WXYZ, Fox, Garbin, Franks, and Harris were arrested after showing up in Ypsilanti, Michigan, to pay the undercover FBI agent posing as a co-conspirator for the explosives. The feds say they will turn over all the evidence to defense attorneys by Jan. 15 and that the trial could last three weeks, WXYZ reported.According to WXYZ, a trial date has not been set, but it will be held in Grand Rapids.Defense attorneys have said their clients were "big talkers" who didn't intend to follow through on the alleged plan.WXYZ's Jim Kiertzner contributed to this report. 1997

To a generation of children, Fred Rogers was a lot more than a soothing voice and a cardigan.On "Mister Rogers' Neighborhood," which had its first national broadcast on February 19, 1968, he sprinkled educational segments with soft-spoken wisdom.The show went off the air in 2001, and Rogers died in 2003. But he's making a posthumous comeback. The US Postal Service will commemorate him on a stamp next month, a documentary film about his beloved PBS show will be released in June and Tom Hanks will play him in a biopic.Fifty years later, Rogers' legacy still resonates.Here's a look at some of his more memorable lessons and quotes, from his show and writings.1. Slow down and be patient. 714

The year's race for Kansas governor has the second-largest field since 1908 — seven Republicans and five Democrats are on the ballot.With a field so large, candidates are now paying for more ads on TV and launching bus tours. It's an effort to win your vote for the primary.University of Kansas political science professor Patrick Miller said the crowded field could be the reason why some candidates and their running mates are taking unconventional measures. Specifically, using their own money to self-fund their campaigns."A lot of big donors want to support the party and they don't want to intervene in the primaries," said Miller.Independent Greg Orman has spent 0,000 of his own money on his campaign.Republican Secretary of State Kris Kobach's running mate, Wink Hartman, has given or loaned the campaign more than .5 million."It is bizarrely unusual. Extraordinary unusual," said Miller.The crowded field, Miller said, could also have an impact on how many votes a candidate gets —especially on the Republican side.Gov. Jeff Colyer has launched an ad campaign, warning voters "a vote for [Ken Selzer, Jim Barnett or Patrick Kucera] is essentially a vote for Kris Kobach."These candidates are sometimes referred to as spoiler candidates, who draw votes from a major candidate with similar politics and could cause a strong opponent to consequently win.Miller said this happened in the 2016 presidential election with Jill Stein taking voters away from Hillary Clinton."In the primary you have four or five candidates splitting the vote, who are all generally conservative," he said, agreeing this could give Kobach an advantage. "If you don't like his personality or his controversy, you might go vote for Jeff Colyer, who is less controversial, or Ken Selzer, Jim Barnett or any of the other candidates.As the days get closer to primary day, Miller said to expect more knocks at the door, fliers, ads to air on TV and on the radio and so forth.He said the candidate's final push won't necessarily be about issues but rather their personalities and stylistic differences that separate them from the others."In the primaries, that matters," he said. 2170