is possible that there is not immune,when virus,bacters,fungus,etc
but yes the re are cepectores in the surfaces of the cell that permits these
germs entry,because part of the dna or rna( that is more symples,and amply transcription that encouter very much receptores to virus,for examples,that rna only.and suffer easyness more mutations),when there is not receptores to these biochemics molecules,and the is not equivalent.
THERE HIDDEN VARIABLES AND OCCULT SYMMETRIES!
then in the arrange of the molecules there are hidden variables that permit permutations of location of these molecules,amplying its degree of bening mutations,and occult symmetries.that does break symmetry,permiting,generations of new arranges of molecules and amino-acids,that escape for externe invasions,can modify receptores and in some cases destroy the receptores.also,
part of the dna or rna if deepth altere
to obstroy malign genes,with rearrange
of the dna,and exchange certain molecules and transcrptions of the rna in protein to escape of transform it in cancer cells,several geners must to actue in those modifications to maintin to integrity of the organism.