Computer virus outbreak 2012

Section Navigation. Facebook Twitter LinkedIn Syndicate. Recent Outbreaks and Incidents - Minus Related Pages. Select A Year. Present Links with this icon indicate that you are leaving the CDC website.

Linking to a non-federal website does not constitute an endorsement by CDC or any of its employees of the sponsors or the information and products presented on the website. You will be subject to the destination website's privacy policy when you follow the link. CDC is not responsible for Section compliance accessibility on other federal or private website. This Theorem expresses that, under the assumption of virus outbreak on a network with limited anti-virus ability, virus epidemic would attain a certain level, and the model admits no the periodic and chaotic dynamic behaviors.

We consider the following Lyapunov function constructed as By using the following equations Eq 20 can be written as Example 2. Example 3. Example 4. Theorem 3. In order to do this, it is critical to have an overall knowledge of the effects of parameters on the virus propagation.

By the proof of Theorem 3. Example 5. A direct calculation yields: Example 6. Based on analyses above, the following suggestions may help eliminate or suppress the spread of computer viruses in a real network:. By taking into consideration the possibility of a virus outbreak on a network with limited anti-virus ability, a new computer virus spreading model is proposed and analyzed.

The results are as follows:. These results indicate that, in some ways, it would be practically possible to eradicate the virus or suppress its prevalence below an acceptable level. Theoretical and experimental results reveal the effects of the parameters on virus propagation.

Consequently, the proposed suggestions may help eradicate or suppress virus propagation over a real computer network. The main goal of this paper is to better understand the propagation of computer virus qualitatively rather qualitatively.

In our view, our work give an insight into the investigation of computer virus spreading by incorporating the objective realistic factors into compartment modeling, which could attract growing attention and interest. Meanwhile, the proposed model is based on the homogeneous network, which can be expanded into heterogeneously node-based model in complex networks, and it is one of our next objectives.

Formal analysis: JGR. Investigation: YHX. Browse Subject Areas? Click through the PLOS taxonomy to find articles in your field. Abstract This paper describes a new computer virus spreading model which takes into account the possibility of a virus outbreak on a network with limited anti-virus ability. Data Availability: All relevant data are within the paper.

Severe Acute Respiratory Syndrome, a viral respiratory illness caused by a coronavirus, was first diagnosed in Asia in February of , later reaching the U. Common symptoms included high fevers, coughing and shortness of breath.

A total of 8, people worldwide became sick, with only eight of those cases being in the U. The U. Mumps spread through close-contact activities such as sports, dancing, kissing, etc. From to , the largest outbreak reported 3, cases in a close-knit religious community in New York City after an infected student returned from the UK where there was another outbreak. Notable symptoms include fever, puffy cheeks and a swollen, tender jaw. Escherichia coli was first reported in the U.

The following year, Taco Bell was linked to E. The contraction of E. In , 49 cases in multiple states were linked to consuming Kroger Beef and in raw cookie dough was the culprit. However, the most infamous outbreak occurred in where a total of 58 cases were reported in 14 states.

In , tomatoes were linked to Salmonella for a total of cases in 21 states. The list of foods linked to salmonella ranged from cantaloupe, peanut butter, raw chicken to even pet food. In , cases of Salmonella linked to small turtles led to a total of cases in 43 states but no deaths reported.

More Videos Syria: Rain doesn't stop protests Walking through a deserted Homs Syrian town held by opposition The U. The virus has two parts, said Vikram Thakur, principal security response manager at Symantec Corporation, known to consumers for its Norton antivirus software. He said one of them points to December 6 and the other to January It was the more complex virus that the former aid worker unwittingly downloaded during a chat. Since she travels to Syria, she has requested that CNN not name her for security reasons and instead refer to her as "Susan.

In one Syrian town, full-throated cries of defiance. To get a picture of the humanitarian needs on the ground in Syria, "Susan" contacted opposition members via the Internet. In January, she received a call via Skype from someone she believed was a regime opponent. Days later, other opposition members told Susan and Othman that the activist she thought she had spoken with was in detention. Activists accuse government forces of coercing him to reveal his user name and identity and of then going online to impersonate him.

This message in Arabic encourages computer users to download a free security program. It actually installs spyware on a user's machine, experts say. Othman says additional activists, who say they were detained and released, tell of being forced to turn over their passwords to Syrian authorities. CNN cannot independently confirm the accusations, because the Syrian government strictly limits international media coverage within its borders.