Madrid ( CNN ) -- Teresa Romero Ramos , a Spanish nurse 's aide who had contracted Ebola after caring for a patient with the deadly disease , is now free of the virus , Spain 's Special Ebola Committee said Sunday . `` Today I 'm very happy , because it can be said that Teresa has overcome this illness , '' Romero 's husband , Javier Limon , said in a video statement released by a family spokeswoman . Two earlier tests showed that Ebola levels in the health worker were almost nil , and a third test came back negative . `` The last two measurements were in 'background ' levels , and there is no significant statistical difference with negative results , '' Luis Enjuanes , an expert on viruses , said in a phone interview , in English , with CNN . `` If for three times , throughout one week , you are background , background , background , in practical terms it means you do n't have the virus . '' Officials have previously said that the amount of the Ebola virus in Romero 's blood had decreased dramatically from the time she was rushed to the hospital two weeks ago , but Enjuanes explained just how close to negative she has already come , even before the latest test sample on Sunday . Why some survive Ebola , some do n't . Romero has recovered enough to produce antibodies , he said . `` It means she 's making her own protection , so any virus fooling around probably will be destroyed or neutralized , '' said Enjuanes , who 's been attending the near-daily meetings of the government 's special committee on Ebola , a panel of medical and scientific experts convened to deal with the crisis . Even though Romero received the negative result for the Ebola virus on this third key test in a week , she will surely remain in hospital for days , possibly a few weeks , in order to recover , Enjuanes said . She has received two main treatments in her battle against Ebola , for which there is still no vaccine . The first was an IV drip with the antibodies of an Ebola survivor -- a Catholic nun who survived the disease in West Africa . And Romero also received an experimental anti-viral drug , favipiravir , Enjuanes said . Spain imported another experimental drug , ZMab , but could only get an older version -- not the newest version , whose stocks have run low globally -- and Romero 's doctors decided not to use it on her , Enjuanes said . To fight her lung problems while also battling Ebola , the doctors administered anti-inflammatory drugs to ease her respiratory problems , even while unsure how that treatment might affect the anti-Ebola measures , Enjuanes said . Madrid euthanizes Ebola patient 's dog . Other patients test negative . Two other patients being monitored at Carlos III hospital also tested negative for the virus on Sunday , according to the Special Ebola Committee . The National Microbiology Institute received tests of Romero and the two other individuals under observation at Carlos III hospital , said the institute 's director , Manuel Cuenca . The tests from a man under observation in Tenerife will be received on Monday , Cuenca told CNN . As of Sunday morning , Romero was the only confirmed Ebola patient , according to a statement from the committee . CNN 's Laura Perez Maestro , Nic Robertson and Joshua Berlinger contributed to this report .
Teresa Romero García , a Spanish nurse 's aide , is now free of the virus . The previous tests showed only a ` ` background '' level of infection . She will still remain hospitalized for days or weeks .