Is it possible that the red-rain particles could enter our body?
I think, the direct way to know the answer should go through a comparison of the results of the recent investigation of the nanoparticles observed by the group of Dr. Godfrey Louis in the Indian red rain (of Kerala, 2001) and the nanoparticles observed by the group of Dr. Christian Humburg in the human-body fluids and matrix. Then it is possible to consider the living troposphere as the origin of such nanoparticles (that I propose to call nanoviroids, the smallest quanta of the animated matter), reaching the Earth`s surface with any blow of the cosmic wind, and in some extremal cases as the red rain. We are breathing them in; and probably also our skin is no a barrier for them.
(for the description of the above photos see the report of the NBM-Group)
with those of Dr. Louis group:
(for the description of the second group of photos see the report of the Indian-Group)