Complex sentence: One argument regarding bioterrorism is in regards to smallpox, which could be synthesised and insertion into existing related pox viruses could theoretically be used to recreate the virus, which has been completely eradicated, except for in two BSL-4 laboratories and digital genomes.
Split into simpler sentences: One argument regarding bioterrorism is in regards to smallpox, which could be synthesised and insertied into existing related pox viruses. This approach could theoretically be used to recreate the virus, which has been completely eradicated, except for in two BSL-4 laboratories and digital genomes.