Live coronavirus updates: White House struggles to stem its own epidemic


Over time, more and more people are wondering if I already had a coronavirus. “I can help the next patient [INAUDIBLE]. “. Now hospitals in Stanford, northern California are giving their healthcare professionals the answer with antibody tests for everyone. We had exclusive access to follow two caregivers and their blood throughout the antibody testing process. “I have a loved one at home, my mother, who is at high risk. So I want to get tested just to make sure I’m okay, and maybe I’ll surprise her and tell her I can come see you. First, they are buffered to make sure they are not currently infected. ” Oh my God. And then they donate a vial of blood for the antibody test. “There are so many asymptomatic carriers around, and there are so many people who may have had them or who had mild symptoms, and who didn’t know it. If I have the antibodies and someone needs my plasma, I would like to help. “Honestly, I hope it will come back positive, that it will teach us a lot. “- The blood antibody test for COVID-19 virus. This blood test, also known as serology, will show if they have ever had a coronavirus and that their immune system has raised antibodies to fight it. But he cannot predict whether these antibodies will immunize them. What this and other reliable antibody tests can do is give us a better idea of ​​the true extent of the coronavirus. And they help researchers design possible treatments and vaccines. “Wider testing will help us understand more quickly what the important variables are, you know, who’s going to be protected, who isn’t.” These are samples of the people we just met, including Heidi and Jamshid. Here they will be spun to separate the blood cells from the plasma. This plasma is then transported to another laboratory on campus for analysis. “You can see that the robot places precisely the right amount of each sample in the wells of the plate. “There has been a high demand for the test. The laboratory is essentially open 24 hours a day. The instruments worked day and night. Dr. Scott Boyd and his team have developed this test, and now they are progressing quickly. They have just received a new shipment of robots called ELISA Instruments. Soon, the team hopes to process at least 4,000 samples a day. They use controls to validate their tests, so they know it works. The positive controls are from coronavirus patients at Stanford, and the negative controls are from healthy blood donors, taken before the coronavirus spreads to humans. Out of 200 people, the results for a few may be inaccurate. But this kind of test is among the best we have. You can see the controls here in the left column of each test plate. When plaque treatment is complete, you may see a yellow color in patient samples that contain antibodies. The darker the color, the more antibodies there are. “But just measuring the total amount doesn’t tell you all the information you want to know. The question is whether someone probably has immunity. The answers are not yet as clear. Only certain antibodies fight or neutralize the virus. The next step for researchers is therefore to identify them. So how many of these neutralizing antibodies are needed to block the virus and prevent reinfection? “So we’re also working on developing a neutralization test for anyone that would allow us to test many patients in the hospital, as well as healthcare workers.” This neutralizing antibody test, which Dr. Boyd hopes to have prepared by the end of May, will give a better idea of ​​who is actually immune. Do you remember Heidi earlier? Well, we watched his sample go through the process. “Coronavirus. And now his results have arrived. “Not detected. Okay, so what do the results say? “Negative. COVID negative and negative serology, unfortunately. But it’s a good thing, right? It can still be good. Today is really my only day of safety because I am going back to work tomorrow. So I feel safe that I can go see my mother without a mask. I don’t think she has the ability to survive a disease like this, so I had to be very careful. I didn’t see his face. She hasn’t seen my maskless face since the beginning of March. I am negative. “What?” “Yeah. “Yay!” “You can take off your mask, at least for today. Come here. ” ” Oh my God. I am so happy. ” ” I missed you. ” ” I missed you. Oh, I haven’t had a hug forever. Oh, I’m so happy. OKAY. Goodbye dear. Bye Bye. ” ” Okay. Bye Bye. ” ” Thank you. Jamshid’s results are the same as Heidi’s: “So I don’t have any antibodies, which is great because it means PPE works, which is fantastic. I definitely went to several rooms with people with a known COVID, and I wear PPE. And I’m glad I’m in a place where I didn’t have to reuse or recycle my PPE. Preliminary data are starting to show that the negative antibody results from Heidi and Jamshid are representative. “Hi, Romey. In places like the Bay Area that haven’t been hit hard, only a small fraction of people test positive for antibodies. “You know, where I go to the grocery store, I get it. I go back to work, I understand. It’s over there, so I’ll always take the same precautions. I will always wear a mask. But these tests are a first step towards understanding immunity. Just having antibodies is not a free pass. “I hope that if someone is positive, it does not give a false sense of security. I still think that everyone should protect themselves as we are today. “


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