Someone can be infected with Ebola for up to 21 days before becoming symptomatic.
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Users' machines will only be infected if they open and run the attachment bearing the worm.
There is also concern about the accuracy of the number of people reported to be infected.
Women who used the gel more consistently were much less likely to be infected, he said.
Almost half of South Africa's mineworkers are said to be infected with the HIV virus.
If you see your machine is working hard, using all available CPU resources, you may be infected.
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"A lot of these women will be infected (with HIV or Aids), " said Annabel Kanabus, director of Avert.
Girls who marry early are more likely to be abused and, these days, to be infected with HIV.
Women whose husbands or boyfriends beat them are more likely to be infected.
Public-health officials were alarmed by the possibility that supposedly healthy people might unknowingly be infected with a contagious retrovirus.
Users can determine whether their computer might be infected by checking a sticker on the back of the system.
The computer may be infected if that designation is followed by the codes AM909, AM910, or AM911, IBM says.
The Imperial College team suggest this could mean that some people could be infected with vCJD, but not develop symptoms.
If she did, then she may have been infected, but she was just as likely to be infected in the shower.
However, it is less effective at preventing TB in the lungs, which is where adults and teenagers tends to be infected.
If found to be infected, they would be put immediately onto a course of what are known as first-line antiretroviral drugs (ARVs).
The company has also contacted users who have registered Aptivas that might be infected and other users whose current addresses it has.
Not only are we being asked to look out for ash, we are also being urged to identify ones that might be infected.
Both drivers and pedestrians who had been in accidents were almost three times more likely to be infected than comparable individuals who had not been.
Last year, 22.8% of pregnant women were found to be infected.
But the 3, 000 volunteers who received the vaccine were only 3.8% less likely to be infected with HIV than 1, 500 volunteers who received only the placebo.
In the southern town of Beitbridge, which borders South Africa, 91 people have died from cholera while several more thousand people are believed to be infected.
Meanwhile, the chief veterinary officer for Northern Ireland has said there was concern that a third flock of sheep may be infected by the foot-and-mouth virus.
They say some of the badgers were known to be infected with TB and that both farms suffered bovive TB outbreaks during the course of the study.
But, of course, Nurse Sally(ph), I remember her, she told me, she was like, you need to come back and, you know, you might actually be infected.
However, in one test when the throttle was applied, it took 13 minutes for a second machine to be infected, and half an hour for a third.
ECONOMIST: A new way of thwarting viral epidemics on computers
While surfing on Google or Yahoo, spyware or a computer virus is automatically and invisibly downloaded on a computer, requiring no user interaction for the computer to be infected.
Between 2m and 3m of the country's 40m people are thought to be infected and most new carriers are in the most economically productive age-group of 15 to 40.
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