Given the task definition and input, reply with output. In this task, you are given a text of many news articles seperated by special token "|||||". Your task is to summarize them.

At least seven children have been born with birth defects and five pregnancy losses related to Zika in the United States. The lifetime cost of care is estimated to be $10 million for each sick child. 
  
 “Each case is a tragedy,” Dr. Frieden said. “A child that may never walk or live independently.” 
  
 The New York case is the first in which a man was infected by a woman, and it raises the prospect that other men — with no travel history to Zika-affected areas and no reason to suspect that they might have the virus — could become infected and pass the virus on, creating a new chain of transmission. 
  
 In the report, researchers found that a man, who was in his 20s and did not travel outside the United States during the year before his illness, contracted the virus after one instance of vaginal intercourse, without a condom, with a woman who had recently returned from a country where the virus is endemic. 
  
 Dr. Mary T. Bassett, the city’s health commissioner, said there were several factors in this case that might have raised the risk of infection: The man was uncircumcised, the woman was in the early stages of her illness when her viral load was high, and she was also at the beginning of her menstrual cycle. 
  
 The woman, described as being in her 20s and not pregnant, had sex with her partner the day she returned to the city. The report does not name the country she visited, but the virus is now widespread in nearly 50 countries throughout South America and the Caribbean. 
  
 “She reported having headache and abdominal cramping while in the airport before returning to N.Y.C.,” the report said. The next day she developed a number of symptoms associated with Zika, including fever, fatigue, a rash, back pain, swelling of the extremities, and numbness and tingling in her hands and feet. ||||| A routine investigation by the New York City (NYC) Department of Health and Mental Hygiene (DOHMH) identified a nonpregnant woman in her twenties who reported she had engaged in a single event of condomless vaginal intercourse with a male partner the day she returned to NYC (day 0) from travel to an area with ongoing Zika virus transmission. She had headache and abdominal cramping while in the airport awaiting return to NYC. The following day (day 1) she developed fever, fatigue, a maculopapular rash, myalgia, arthralgia, back pain, swelling of the extremities, and numbness and tingling in her hands and feet. In addition, on day 1, the woman began menses that she described as heavier than usual. On day 3 she visited her primary care provider who obtained blood and urine specimens. Zika virus RNA was detected in both serum and urine by real-time reverse transcription–polymerase chain reaction (rRT-PCR) performed at the DOHMH Public Health Laboratory using a test based on an assay developed at CDC (1). The results of serum testing for anti-Zika virus immunoglobulin M (IgM) antibody performed by the New York State Department of Health Wadsworth Center laboratory was negative using the CDC Zika IgM antibody capture enzyme-linked immunosorbent assay (Zika MAC-ELISA) (2). 
  
 Seven days after sexual intercourse (day 6), the woman’s male partner, also in his twenties, developed fever, a maculopapular rash, joint pain, and conjunctivitis. On day 9, three days after the onset of his symptoms, the man sought care from the same primary care provider who had diagnosed Zika virus infection in his female partner. The provider suspected sexual transmission of Zika virus and contacted DOHMH to seek testing for the male partner. That same day, day 9, urine and serum specimens were collected from the man. Zika virus RNA was detected in urine but not serum by rRT-PCR testing at the DOHMH Public Health Laboratory. Zika virus IgM antibodies were not detectable by the CDC Zika MAC-ELISA assay performed at the New York State Department of Health Wadsworth Center. The CDC Arbovirus Disease Branch confirmed all rRT-PCR results for urine and serum specimens from both partners. 
  
 During an interview with DOHMH on day 17, the man confirmed that he had not traveled outside the United States during the year before his illness. He also confirmed a single encounter of condomless vaginal intercourse with his female partner (the patient) after her return to NYC and reported that he did not engage in oral or anal intercourse with her. The man reported that he noticed no blood on his uncircumcised penis immediately after intercourse that could have been associated either with vaginal bleeding or with any open lesions on his genitals. He also reported that he did not have any other recent sexual partners or receive a mosquito bite within the week preceding his illness. 
  
 Independent follow-up interviews with the woman and man corroborated the exposure and illness history. The patients were consistent in describing illness onset, symptoms, sexual history, and the woman’s travel. This information also was consistent with the initial report from the primary care provider. 
  
 The timing and sequence of events support female-to-male Zika virus transmission through condomless vaginal intercourse. The woman likely was viremic at the time of sexual intercourse because her serum, collected 3 days later, had evidence of Zika virus RNA by rRT-PCR. Virus present in either vaginal fluids or menstrual blood might have been transmitted during exposure to her male partner’s urethral mucosa or undetected abrasions on his penis. Recent reports document detection of Zika virus in the female genital tract, including vaginal fluid. A study on nonhuman primates found Zika virus RNA detected in the vaginal fluid of three nonpregnant females up to 7 days after subcutaneous inoculation (3), and Zika virus RNA was detected in specimens from a woman’s cervical mucous, genital swab, and endocervical swab collected 3 days after illness onset, using an unspecified RT-PCR test (4). Further studies are needed to determine the characteristics of Zika virus shedding in the genital tract and vaginal fluid of humans. 
  
 This case represents the first reported occurrence of female-to-male sexual transmission of Zika virus. Current guidance to prevent sexual transmission of Zika virus is based on the assumption that transmission occurs from a male partner to a receptive partner (5,6). Ongoing surveillance is needed to determine the risk for transmission of Zika virus infection from a female to her sexual partners. Providers should report to their local or state health department any patients with illnesses compatible with Zika virus disease who do not have a history of travel to an area with ongoing Zika virus transmission, but who had a sexual exposure to a partner who did travel. 
  
 Persons who want to reduce the risk for sexual transmission of Zika virus should abstain from sex or correctly and consistently use condoms for vaginal, anal, and oral sex, as recommended in the current CDC guidance (5). Guidance on prevention of sexual transmission of Zika virus, including other methods of barrier protection, will be updated as additional information becomes available (http://www.cdc.gov/zika). ||||| (CNN) In another startling Zika development, the first case of female-to-male sexual transmission of the Zika virus has occurred in New York, the Centers for Disease Control and Prevention announced Friday. Up until now, it was thought that the only likely route of sexual transmission was male-to-female or male-to-male. 
  
 The surprising development prompted the CDC to immediately change its guidance for pregnant women in relation to the virus. Even though no cases of woman-to-woman Zika transmission have been reported, the CDC now urges female sexual partners of pregnant women to use barrier methods every time they have sex if they live in or have recently returned from an area with active Zika transmission. 
  
 The CDC updated its guidance for all sexually active individuals to use condoms or abstain from sex with a partner who has lived in or traveled to a Zika-affected area. "Sex includes vaginal, anal and oral sex, and may also include the sharing of sex toys," according to the CDC. 
  
 The agency also advises health care providers to screen any patient who has been with a sexual partner exposed to the virus and has symptoms. 
  
 Detective work cracked the case 
  
 The CDC report reads like a detective novel. A non-pregnant woman in her 20s had unprotected vaginal sex with a male partner on the day she returned from travel to a country where Zika is circulating. The next day, she came down with Zika-like symptoms, including fever, rash, fatigue and muscle pain, along with numbness and tingling in her fingers and toes. On day three, she visited her primary care doctor, who took blood and urine samples, and sent them off to the NYC health department. Both tested positive for the virus. 
  
 On day seven after intercourse, her male partner, also in his 20s, began to show the same typical signs of Zika, such as fever, rash, joint pain and red eyes, despite the fact that he had not traveled outside the United States for more than a year. 
  
 Two days later, he visited the same doctor, who became suspicious of the possibility of sexual transmission and sent the man to the New York City health department to run tests. The urine test was positive for Zika; the blood serum was not. 
  
 In subsequent interviews with the health department, the man reported that he had only the one sexual encounter with his partner during that time period, no other recent sexual partners and no mosquito bites during the week preceding his symptoms. 
  
 The conclusion: "The timing and sequence of events support female-to-male Zika virus transmission through condomless vaginal intercourse," the CDC said. 
  
 Mounting evidence 
  
 While this is the first documented case of female to male sexual transmission, it's not the first clue that the Zika virus might be hiding in the female genital tract. A case report published this week in The Lancet Infectious Diseases journal tells the story of a 27-year old Guadeloupean woman who came down with Zika in May. Even though Zika was absent from her blood and urine 11 days after she fell ill, her cervical mucus still tested positive for the virus. And recently, a study on rhesus monkeys showed that the virus remained in the vaginal fluid of three non-pregnant females. 
  
 Studies have shown that Zika remains in both urine and saliva long after it resolves in the blood, even though the likelihood of transmission via that route is considered extremely low. 
  
 Slow rise of cases? 
  
 known cases of sexually transmitted Zika in the United States. To put that into comparison, there have been 1,305 travel-related cases of Zika in the mainland United States and no known cases where Zika has been transmitted via a mosquito bite. But it's also true that four out of five people who come down with Zika have no symptoms, so experts admit that the numbers could be much higher. According to the latest CDC statistics , there are only 15known cases of sexually transmitted Zika in the United States. To put that into comparison, there have been 1,305 travel-related cases of Zika in the mainland United States and no known cases where Zika has been transmitted via a mosquito bite. But it's also true that four out of five people who come down with Zika have no symptoms, so experts admit that the numbers could be much higher. 
  
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 And in Puerto Rico, where Zika is spreading rapidly, officials can't monitor sexual transmission because "it is not possible to determine whether infection occurred due to mosquito-borne or sexual transmission," the CDC said. |||||

The first case of a woman sexually transmitting the Zika virus to a man is now in the books. Before the New York City case occurred, officials believed only males could transmit the virus sexually (either to women or to other men). But then, the CDC reports, a man developed Zika symptoms even though he hadn't traveled outside the United States any time during the prior year. His female partner, however, had just returned from an area where Zika is present, and had developed the illness herself the week prior. Before realizing she had the virus, she'd had unprotected sex with the man. He saw the same doctor as her, who suspected she'd passed the illness to him sexually; the city's health department confirmed that suspicion. CNN calls the development "startling." The CDC is now changing its guidance for pregnant women, since this means woman-to-woman transmission may also be possible: All pregnant women, whether their sexual partners are male or female, should use barrier methods when having sex if they live in or their partner has recently traveled to an area where Zika is present. The virus can cause birth defects, may cause developmental problems post-birth, and may also be linked to pregnancy loss, the New York Times reports. There have now been 1,305 travel-related cases of Zika reported in the US, and 14 known cases of sexually transmitted Zika in the US, per CNN.