The burden of proof actually swings both ways.. ? Is the infection rate as high in those who do not work with live rodents as high as your implying it must be?
Accusing another poster of lying due to not meeting your personal determination of a burden of proof isn't supported by the level of documentation you have provided in this thread.
For example if we look at the CDC information on LCMV (
http://www.cdc.gov/healthypets/lcmv_rodents.htm), we can see that it has only been transmitted to humans from mice and hamsters so rats whether live or frozen are an unlikely vector for human infection, so there is no need to throw them out since the risk of infection is so small that it's not considered significant... In addition, simple methods (as recommended by the CDC for the owners of pet rodents) can significantly reduce the risk of infection specifically
...
So in this case, when using frozen thawed rodents we can see that first off, you should wash your hands after handling them, and second do not kiss them or stick them in your mouth.. since we don't have to worry about rodent bedding, cleaning rodent cages....etc.
As for risks of infections, despite the thousands of pet mice and hamsters in the USA, this is what the CDC has to say about the chances of getting sick from the virus..
The greatest risk for contracting the virus is actually from wild rodents (see
http://www.cdc.gov/ncidod/dvrd/spb/mnpages/dispages/lcmv/qa.htm) as about 5% of wild house mice are infected but those who work with live mouse and/or hamster colonies or rodents and in those cases, simple precautions such as using protective gear, and/or the precautions listed above can significantly reduce thier chance of infection...
As for the rate of infection..lets look at a case study in a North American City (see
http://cat.inist.fr/?aModele=afficheN&cpsidt=2747425) where the rate of infection including all age classes was 3.5% and the mortality rate for the virus according to the CDC is less than 1%. I don't see why some are advocating for a scorched earth policy from the virus.. Your inflating the risk.. for example you are at much greater risk of contracting giardia from a random cat if your not careful since studies have some populations of cats showing an infection rate of 8.5% in the US (See
http://www.sciencedirect.com/science/article/pii/S1098612X11000209) or even the even greater risk of zoonotic Toxocara cati (see
http://www.sciencedirect.com/science/article/pii/S1471492203000278) since some studies in the USA, have shown it to be found in up to 21% of cats...
Some comments
Ed