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Obstinate continuation of characteristic behavior, or of existence despite treatment or adverse environmental conditions.
[L. persisto, to abide, stand firm]


1. Obstinate continuation of characteristic behavior.
2. Survival despite opposition or adverse environmental conditions.
[L. persisto, to abide, stand firm]


the period of time between a virus being acquired by a VECTOR and its being transferred to a new host.

Patient discussion about persistence

Q. Have you ever heard that vaccines cause autism? If so why such thought persist? Hi my new friends! Hope you are all in good health! Have you ever heard that vaccines cause autism? If so why such thought persist? I look forward to reading all of your answers tomorrow.

A. Yes I heard about that and avoided being injected sometimes. This belief persists because signs of autism may appear around the same time that children receive the vaccine that prevents measles, mumps and rubella, and some parents worry that the vaccine caused the autism.

Q. Can lung cancer be diagnosed on behalf of persistent cough? My father is a heavy smoker. He smoked for all his adult life and he never stopped. In the last few weeks he started to have persistent cough attacks. Can those attacks be the first sign of lung cancer?

A. Smoking can damage the lung in many ways. The fact that someone that is a smoker is suffering from chronic cough doesn't mean that he is suffering from lung cancer. To get a cretin diagnosis you will have to do a chest X-ray.
here is a X-ray with the lesion that might be an actual lung cancer

Q. Headache that won’t go away. Help! Hi, I’m 47 years old man, working as accountant. Yesterday afternoon, I came back home, and after some time I started to feel headache that still going. Is it dangerous? Is it possible I have something like bleeding? I wasn’t hit or injured in anyway in my head before this headache appeared

A. There are two types of headaches: primary headaches and secondary headaches. Primary headaches are not associated with (caused by) other diseases. Examples of primary headaches are migraine headaches, tension headaches, and cluster headaches. Secondary headaches are caused by associated disease. The associated disease may be minor or serious and life threatening. Tension headaches are the most common type of primary headache. Tension headaches are more common among women than men. Migraine headaches are the second most common type of primary headache. Secondary headaches have diverse causes, ranging from serious and life threatening conditions such as brain tumors, strokes, meningitis, and subarachnoid hemorrhages to less serious but common conditions such as withdrawal from caffeine and discontinuation of analgesics. In any case if your headache continues you should see your doctor immediately. Hope this helps.

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References in periodicals archive ?
COPAN Systems provides the industry's only purpose-built Persistent Data storage platform for cost-effective management, storage, access and recovery of Persistent Data for Global 5000 companies challenged with managing the cost and complexities of accelerated data growth.
The launch of a new International Channel Partner Program that expands COPAN's ability to deliver its patented MAID technology embedded into COPAN's persistent data storage solutions to enterprise customers worldwide.
COPAN's Enterprise MAID technology platform is purpose-built for the cost-effective and energy-efficient storage of persistent data and delivers significant benefits including cost savings of 90 percent of energy per unit of storage.
Persistent data - unchanging or static data that makes up the wide majority of data stored by enterprises - is at the heart of the data overload problem that plagues large corporations.
By migrating persistent data to the new COPAN Systems solution, FMI frees up more expensive tier one storage for its original purpose - modifying and storing quickly changing transactional data.
Ease of Data Access, Reliability, and Affordability Cited as Key Requirements for New Persistent Data Storage Architecture Designed to Manage Persistent Data - Estimated to Be More Than 70 Percent of Today's Corporate Data
It is a significant milestone, and reflects SGI's commitment to maintain focus on advancing market leading storage solutions to manage persistent data.
a provider of high performance storage archive solutions for real-time access to long-term persistent data.
COPAN's Enterprise MAID technology platform is purpose-built for the cost-effective and energy-efficient storage of persistent data and it delivers significant user benefits.
The system allows fast and cost-effective access to persistent data while significantly reducing the energy required to store it.
Editing persistent data out of a programming language therefore requires nearly as much additional effort as the underlying read/select operation.
PartnerLink reportedly solves the problem of standardisation by using ZIP as a standard, lowering the cost and time of implementation and enabling persistent data protection for files whether in storage or transit.

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