Note: this intracellular enterovirus infection found inside cells, and comprising a mixture of
positive single-stranded RNA,
negative single-stranded RNA and
double-stranded RNA, goes by number of names, including the:
non-cytolytic enterovirus, non-cytopathic enterovirus, terminally-deleted enterovirus, and defective enterovirus.
Dr Chia has explained in his video presentations that this process of two strings of single stranded RNA combining together to form one string of double-stranded RNA is actually a reversible process: as I understand, it is thought that the double-stranded RNA can also split apart again, and revert back to two strings of single stranded RNA again.
Dr Chia describes this enterovirus double-stranded RNA as the the "seeds" of this non-cytolytic intracellular infection. Seeds are very hardy, and you can destroy a plant, but it can regrow again from its hardy seeds. Likewise, the double-stranded RNA is very hardy, and may be involved in the spread of these non-cytolytic infections from cell to cell.
In terms of manufacturing viral proteins inside the cell, I believe only the positive single-stranded RNA can be used to do this. The double-stranded RNA is hardy, but I don't think this can used to express and manufacture viral proteins.
There is a thread
here about how non-cytolytic enteroviruses infections may spread from cell to cell.
Note that you cannot detect non-cytolytic enteroviruses infections using antibody titer testing. Antibody titers are a indication of the amount of viral particles in the blood; but non-cytolytic enteroviruses are not found in the blood, but within human cells.
In fact in both ME/CFS and coxsackievirus B myocarditis, you can detect enteroviral RNA, but you often fail to detect any viral particles. Initially researchers found this very mysterious; but once non-cytolytic enteroviruses were discovered, they explained these findings: the enteroviral RNA found even in the absence of any viral particles actually likely comes from the non-cytolytic virus.
A slide from Dr Chia detailing the non-cytolytic virus (single and double stranded RNA):
View attachment 8458