Bad guys also have the ability to infect clouds with spyware, botnets and other malicious programs, Reavis said.
However, the researchers urged "vigilance" in case the Salmonella strain mutated again to become able to infect people with healthy immune systems.
Researchers have struggled to keep up with its quick metamorphoses and smart spam campaigns that use attached PDFs, e-cards, and even YouTube invitations to infect users with malicious software.
Google says those malicious sites are flagged in its search results 12 to 14 million times daily to warn users away from pages that could steal their credentials or infect them with malware.
FORBES: As Neighborhood Watch For The Web, Google Now Flags Nearly 10,000 Dangerous Sites Daily
As with any vaccine, the aim is to prompt the immune system to recognise this outer shell and destroy the pathogen before it has time to lock onto cells and infect them with its genetic material.
Next year, Professor John Oxford, an expert in virology from Queen Mary's School of Medicine and Dentistry, in London, will lock volunteers in a hotel for a week, deliberately infect some with the flu virus, and wait to see what happens.
Researchers writing in The Lancet do not know exactly why Mycobacterium abscessus - which is distantly related to the bacteria that causes tuberculosis - is more likely to infect people with cystic fibrosis but it could be related to problems with the immune system.
The therapy, developed by UniQure, uses a virus to infect muscle cells with a working copy of the gene.
Security firm Websense said it had discovered numerous websites that were using the flaw to infect a PC with spyware.
That makes it especially insidious, as users can infect their computer with software that gives hackers remote access to their desktops without downloading an e-mail attachment or running a program.
"It's most worrisome that MRSA can infect completely healthy people with healthy lifestyles, something that was almost unheard of 15 years ago, " Boucher said.
In early experiments, Bhatia's lab, called the Laboratory for Multiscale Regenerative Technology, was able to infect her liver cells with malaria for the first time two weeks ago and hopes to be able to offer malaria researchers a way to test drugs that will kill the hypnozoites.
These drive-by download attacks can infect personal and business computers alike with all types of malware.
FORBES: Social Media: A Nightmare For Enterprise IT Security?
Drug-resistant bacterial strains are created in hospitals because not only is there a large population of weakened patients with open wounds to infect, but the use of antibiotics is widespread.
After all, hackers used a similar flaw in Java to infect more than 600, 000 Macs with the Flashback malware earlier this year.
FORBES: Another Critical Security Flaw In Java Appears Before Oracle Has Even Resolved The Last One
Security firm F-Secure has experimented with different ways the exploit could infect users through email and text messages.
FORBES: How "The Most Advanced iPhone Exploit In The World" Hacks Your Handset
With an aura of defeat starting to infect its global sprawl of 31, 000 eateries, the board nudged out chief executive Jack M.
The World Health Organization says that most avian flu viruses do not infect humans and the majority of H5N1 cases have been associated with contact with infected poultry.
Now it seems that the latest worm to infect AOL's instant messaging community, Aim, actually chats with the users it is targeting in order to persuade them to download and run an infected file.
But this is not possible with diseases that might be used as weapons but otherwise never infect anyone.
Dai Zovi, coauthor of The Mac Hacker's Handbook, says JailbreakMe's sophistication is on a par with that of Stuxnet, a government-coded worm designed to infect Iran's nuclear facilities.
It does not normally infect humans, although sporadic cases do occur usually in people who have had close contact with pigs.
The HIV virus reproduces with a cell, then virus particles bud off that cell's surface to infect other cells in the body.
Existing models are based on indirect measures of how infectious an animal is a cow with high levels of the virus in its blood, for instance, is assumed to be able to infect other animals.
应用推荐