It mimics Pneumonic Plague...and not all are showing H1N1...
...from a friend...with permission...not mine...
Since the name of this thread is "Unknown Virus", I am going to share some information I found.
I have pulled the more pertinent information from this article, in order to break down some of the technical jargon.
Please take a look at this.
The name of the illness is called Leptospirosis
Here is what pubmed has to say about it.
Leptospirosis: The “mysterious” mimic
Leptospirosis is a potentially fatal bacterial disease that can display a wide array of clinical presentations thus mimicking better-known illnesses. Although, leptospirosis is primarily a zoonotic disease, it frequently inflicts severe illness and death on communities around the globe. A comprehensive overview of the disease in wake of the 2006 outbreaks in India is hereby presented and discussed.
The pulmonary form of leptospirosis is characterized as a hemorrhagic pneumonia that can resemble pneumonic plague and hantavirus pulmonary syndrome.
CAUSATIVE AGENT OF LEPTOSPIROSIS
Leptospirosis is caused by leptospires, which are spiral-shaped bacteria from the family Leptospiraceae and genus Leptospira. These bacteria are long, thin, and motile spirochetes that can be either free living in the environment or found as parasites in animal hosts.
 Leptospires require moist environments for survival. They can survive in contaminated freshwater sources (lakes and ponds) and muddy environments for many months. However, they can only survive for a few hours in saltwater.
ANIMAL RESERVOIRS OF LEPTOSPIRES
Although, leptospirosis is typically a zoonotic disease, leptospires can also infect humans. These bacteria can infect and colonize a wide variety of wild and domestic animals. However, the rat is typically the reservoir of leptospires
PREVIOUS OUTBREAKS OF LEPTOSPIROSIS
Since the original identification of leptospirosis by Dr. Weil, outbreaks of leptospirosis have occurred sporadically throughout world.
Elsewhere in the world in 2005, there were at least 27 cases and eight deaths due to leptospirosis in the Ukraine.
Concurrent with these human cases, a significant percentage of the local mice populations, up to 25%, were testing positive for leptospirosis.
An added sidenote: In the past there have been several outbreaks of Leptospirosis in India, and this very well could be the pathogen responsible for the unknown virus and mysterious deaths there.
TRANSMISSION OF LEPTOSPIRES
Infected rodents are typically the source of human infections. These human infections are most commonly due to contact with water or environmental surfaces contaminated with infected urine.[13,49] Other rodent body fluids (excluding saliva) can also transmit leptospires to humans, animals, and the environment.
PATHOPHYSIOLOGY OF LEPTOSPIROSIS
Leptospirosis has symptoms that may mimic better-known diseases including influenza, dengue fever, meningitis, hepatitis, and other viral hemorrhagic diseases.[1,18] With the greater publicity of these other diseases, leptospires are frequently overlooked as a source of disease.
Leptospirosis should be considered in the differential diagnosis of individuals who have an abrupt onset of fever, muscle aches, jaundice, headache, conjunctival suffusion, and chills. Conjunctival suffusion and muscle aches in the calf and lumbar areas are also highly characteristic of leptospirosis; however, these signs and symptoms are not confirmatory for leptospirosis.
During the course of infection, leptospires invade all the internal organs and tissues, and damage the endothelial linings of the small blood vessels.
Glycoprotein toxin produced by the leptospires causes capillary leakage which can result in severe hemorrhaging.
This damage is the source of the majority of the signs and symptoms of leptospirosis.
As the damage progresses, lesions develop throughout the organs. This damage results in
(1) injury in the proximal convoluted tubules (leading to interstitial nephritis) in the kidneys,
(2) hepatic capillary damage with hepatic cell damage leading to jaundice, blood-clotting problems, and possible liver failure, and
(3) inflamed meninges resulting in the symptoms of aseptic meningitis in the immune phase.
TREATMENT OF LEPTOSPIROSIS
Milder cases of leptospirosis can be treated with amoxicillin, ampicillin, doxycycline, penicillin, streptomycin, tetracycline, or erythromycin. Ceftriaxone and cefotaxime, and quinolone antibiotics may also be used for treatment of mild leptospirosis cases.
Treatment with antibiotics should begin as soon as leptospirosis is suspected and if possible before the fifth day after the start of symptoms. However, serological tests will not be positive until about 1 week after the onset of symptoms and cultures may not be positive for several weeks.
For individuals with severe infections and Weil's syndrome, hospitalization in an intensive care unit is typically required. Intravenous penicillin should used for severe leptospirosis. Dialysis will likely be necessary for the renal failure.
Transfusions may be needed for hemorrhaging; and, steroids may be necessary for treatment of thrombocytopenia.
Leptospirosis can be labeled a truly menacing disease. It fits the spectrum of agent, host, and environment which relates to clinical diseases with a community focus.
Now after having read the article, a few things came to mind. If a Bioweapon was indeed used, the perfect mode of transmission would be water. Think about it. This bacteria thrives in water. It would explain why the rate of infection seems to rise so quickly. It would also allow the guilty party to maintain some control, of who is infected and in what regions.
Leptospirosis would not be suspected during a world wide pandemic. It mimics Pneumonic Plague, Influenza, and a few other hemorrhagic virus'.
It also looks very much like the Spanish flu of 1918.
Unless one were testing for it, it would go unnoticed. In order to have a good prognosis Antibiotics need to be started by the 5th day, yet it takes almost 7 days for the titers to be high enough representing acute infection.
Just throwing around some other ideas, since Swine Flu was only detectable in half of the cases.
What do you think about this possibilty?http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2700559/http://wecf.eu/english/projects/46-ukraine-safesanitation.phphttp://www.google.com/url?sa=t&source=web&ct=res&cd=1&ved=0CAcQFjAA&url=http%3A%2F%2Fwww.day.kiev.ua%2F197787%2F&rct=j&q=garbage+problem+Ukraine&ei=ZKT3StCKBsGX8AawuZ3zCQ&usg=AFQjCNHvdJNizKDd9dn6UihpFDAOjJe8kQ&sig2=FRERw1dogJgLKwbUA7UgTA
Notice the last 2 links on Sanitation Conditions...