[Blitzer:] In global coronavirus headlines late this afternoon, Brazil's President told our sister network CNN Brazil, he has taken a second coronavirus test and it came back positive. CNN's Bill Weir is outside the presidential palace for us. Bill, tell us more?
[Bill Weir, Cnn Correspondent:] Wolf, as the COVID-19 numbers in Brazil reach around 2 million infected and 75,000 lives lost, President Jair Bolsonaro confirmed today that he tested positive for a second time. In as many weeks, he remains in some isolation here in the presidential palace and says it's horrible. He's itching to get up and out and back to work, has no symptoms of fever or loss of taste or smell. This is a man who famously said he'd rather has son's die in a car crash than come out as gay. That the military dictatorship of years past in this country didn't go far enough and murdering dissidents. So he already has a fierce opposition in this country. The question is whether his pandemic management will erode his base about 30 percent, 35 percent of the country. There have been 51 separate formal requests for his impeachment to the lower House of Congress. But the folks there, the politicians say that's all political. And the last thing they need in the middle of a pandemic is more politics. Wolf?
[Blitzer:] Bill Weir, reporting from Brasilia. Thank you. The British government now plans to require mask to be worn in stores and shops but not in offices. Let's go to CNN's Max Foster. Max, tell us more.
[Max Foster, Cnn Correspondent:] Wolf, the British government pushing back on calls to make masks mandatory in offices after they made them compulsory in shops and on the public transport system. Health Secretary Matt Hancock said they looked at the idea, but then rejected it. The thinking is that masks might help when you're in front of someone for a short amount of time, but they don't necessarily help if you're next to someone all day. There are certain exemptions for people that don't have to wear masks, but smokers aren't amongst them, despite complaints from many smokers that they find masks uncomfortable. Interestingly, a government study found that a million people had actually given up smoking since the pandemic hit the U.K. and more than 400,000 had try to give up particularly young people. It seems they've heated efficient advice, which says that smokers suffer more severe symptoms than others when the virus hits. Wolf.
[Blitzer:] Max Foster reporting, thank you. CNN, meanwhile, has learned the U.S. Canadian border will remain close to nonessential travel for at least another month. CNN's Paula Newton is in Ottawa for us. Paula, what are your sources telling you?
[Paula Newton, Cnn Correspondent:] Wolf, the spiking coronavirus cases in the United States has been unnerving here in Canada as well, and for that reason, Canadian government sources tell CNN that by mutual agreement, the U.S.-Canada border will remain closed until at least August 21. Now, right now is open to only essential traffic. And key here is that Canadian public health officials tell me that they will be placing additional personnel at those land border crossings to make sure that people with symptoms of COVID aren't getting into the country. Remember, there are exemptions for health care workers, truck drivers, flight crews, but also to make sure that anyone entering Canada is adhering by that strict 14-day quarantine. And it's not hard to see why there is a concern. I want you to take a look at the numbers here. If you look But also to make sure that anyone entering Canada is adhering by that strict 14 day quarantine. And it's not hard to see why there is a concern. I want you to take a look at the numbers here. If you look at the United States and Canada, New positive cases, they couldn't be diverging more. Canada has less than 400 new cases each and every day. The United States, of course, upwards of 50,000 or 60,000 each and every day for the last few weeks. You know, that means that in just two days in the United States, they are seeing more cases than Canada has seen in the entire pandemic. And that's why it's not hard to see that in one recent poll, 80 percent of Canadians say they want to see that border closed for quite some time. Wolf?
[Blitzer:] Yes, not a surprise. All right, Paula Newton, thank you very much. In Hong Kong, experts say a new wave of coronavirus cases probably is linked to the easing of social distancing restrictions. So guess what, the restrictions are now coming back. Let's go to CNN's Will Ripley, he's on the scene for us. What's the latest, Will?
[Will Ripley, Cnn Correspondent:] Wolf, here in Hong Kong, public health experts are warning. This third wave of COVID-19 could be by far the most devastating this city has seen since the start of this pandemic. The reason is that the cases are no longer coming in from the outside. They're being spread within the community and more and more cases being reported every day. When just two weeks ago, they were not they're not exactly sure how this happened. But I spoke with three infectious disease specialists who say the numbers started ticking up like clockwork as social distancing measures were eased. So now the city is reimposing even stricter social distancing measures, and they're shutting down a lot of businesses that had just started to get back into the swing of things, gyms and bars, schools, Hong Kong Disneyland and restaurants during dinnertime. The hope is that they can try to find as many people who have this and get them out of the community before the numbers really skyrocket because experts are also warning that the virus is mutating, which could make it more contagious. Wolf?
[Blitzer:] Will Ripley in Hong Kong, thank you. Coming up, how long do antibodies from coronavirus actually provided unity? The answer could be key to fighting the pandemic. We'll be right back.