Lifestyle Health Dallas Woman Tests Positive for Coronavirus Again After 4 Months: 'I Was Floored' Doctors are unsure why the virus sometimes reappears — or if it is contagious the second time around By Claudia Harmata Published on June 17, 2020 11:15 AM Share Tweet Pin Email Photo: NBC DFW/Facebook A woman in Dallas is fighting her second battle against the coronavirus. Meredith McKee first tested positive for the potentially deadly virus in February, diagnosed after feeling "clear and obvious" symptoms, she told NBC 5. "I had a dry cough like you would not believe. It would not stop,” McKee recalled, explaining that she managed to fight off the first bout of the virus from home. She even donated some of her plasma after testing positive for antibodies. "I felt great finally [doing] something good coming out of the hell that I’ve been through because I'm going to help up to eight people with this plasma,” she said. Arizona, Florida and Texas See Their Highest Number of New Coronavirus Cases in the Last Week However, last week, McKee shared a tearful photo of herself from a hospital bed at Texas Health Presbyterian in Dallas. After admitting herself with high blood pressure and a headache on Friday, she found out she was once again positive for COVID-19 four months after her initial diagnosis. "I was floored when it was positive," McKee said. Never miss a story — sign up for PEOPLE's free daily newsletter to stay up-to-date on the best of what PEOPLE has to offer, from juicy celebrity news to compelling human interest stories Doctors are not sure why the virus sometimes reemerges — or if it is contagious the second time around. Some experts say that a second positive test could just mean that the virus is taking its time to leave the body, but that it can't infect others. "It's possible that people could shed remnants of the virus for some period of time. That doesn't mean anything is wrong with them or that they are contagious," Dr. William Schaffner, an infectious disease expert at Vanderbilt University Medical Center in Nashville, told NBC 5. Similarly, Dr. Ania Wajnberg, associate director of medicine at the Icahn School of Medicine at Mount Sinai in New York City, told the outlet that they are finding that second positives are not strands of live virus. Man Gets a $1.1 Million Bill After Spending 62 Days in the Hospital with Coronavirus "What we're finding more and more is that the fragments of virus that are being picked up on these swabs weeks later are not able to replicate," she said. "They're not live virus." Dr. Robert Haley, an epidemiologist at UT Southwestern, added that while it is obviously possible to get coronavirus twice, it appears to be a rare occurrence. In McKee's case, her doctors believe that the virus simply went dormant after her first bout of illness, a theory backed by Dr. Benjamin Neuman, a virologist and the head of the biology department at Texas A&M University-Texarkana. Neuman told Healthline that he believes a second positive test is not necessarily a reactivation of the virus but rather a resurgence. The virologist thinks people are probably “being discharged with some virus still in them, and then the disease returns.” As information about the coronavirus pandemic rapidly changes, PEOPLE is committed to providing the most recent data in our coverage. Some of the information in this story may have changed after publication. For the latest on COVID-19, readers are encouraged to use online resources from CDC, WHO, and local public health departments. PEOPLE has partnered with GoFundMe to raise money for the COVID-19 Relief Fund, a GoFundMe.org fundraiser to support everything from frontline responders to families in need, as well as organizations helping communities. For more information or to donate, click here.