Simian foamy viruses (SFVs) are efficiently transmitted from non-human primates to humans. Despite their persistence , neither pathogenic effects nor secondary transmission have been reported, suggesting an efficient immune control of this retrovirus in human population. Here, we study the neutralizing activity in the plasma of SFV-infected people living in… (More)
Murine AIDS (MAIDS), caused by a defective murine leukemia virus, is a severe lymphoproliferative disease associated with profound immunodeficiency and increased susceptibility to opportunistic infections. Most subsets of lymphocytes, including CD4+ and CD8+ T cells, are refractory to mitogen stimulation. As a first step to examine proximal signal… (More)
Measurements of the temporal variation in the stratospheric nitric oxide concentration covering a time period from 11:00 to 20:30 local time show the effect of solar ultraviolet sunset. The experimental results strongly support the theorized role of nitric oxide as a catalyst in the destruction of ozone and its importance in the stratospheric ozone balance.