Is the Congo outbreak really over? The Ebola virus can be dormant for more than a year.

The World Health Organization (WHO) recently declared the official end of the Ebola outbreak in Congo.
However, analysis of epidemiological tracking, blood testing and genetic data from viruses has found that the Ebola virus can be dormant for more than a year before symptoms appear, according to a new study published in the Lancet Infectious Diseases sub-journal of the Lancet.
the World Health Organization announced on July 24 thinly-opened the Ebola outbreak in The Democratic Republic of the Congo (DRC) in May this year, and WHO data showthat 53 cases of Ebola haemorrhagic fever reported in the country, 29 of which have died, with no new confirmed cases detected since June 12.
WHO also called for continued efforts to tackle other diseases that continue to ravage the country.
a study funded by the U.S. Centers for Disease Control and Prevention, the U.S. Defense Threat Reduction Agency and WHO found an unusual case: a woman who was thought to have contracted the virus in July 2014 while caring for her sick brother.
her brother, a nurse's assistant at a local hospital who fell ill while helping care for a suspected Ebola patient, died of an infection.
the woman suddenly became ill in August 2014 and recovered without treatment.
September 2015, the woman also gave birth to a healthy baby.
however, she again suffered from severe illness in October of that year, and in November, a 15-year-old son died after contracting the Ebola virus.
tests showed that her husband and another son were hiv-positive, and that she and her baby were negative and had enough viral antibodies in their bodies.
researchers followed the family's history of contact with the virus and analyzed stored blood samples, which they believed were first in 2014, suggesting that the woman's Ebola virus had been dormant for more than a year, that the virus persisted and caused the disease to recur, and spread the virus to three family members a year later.
also means that Ebola disappears in a short period of time does not mean that it will not reappear.
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