> That is not even remotely true for a novel viral sequence that would be very dangerous.
We don't need fully novel sequences. The original Spanish Flu strain sequence is published and well known. And you can always modify existing ones with known aspects (e.g. as in this infamous paper: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC114026/). And yes, it is more difficult to build an atomic bomb, as materials are thankfully expensive and difficult to obtain.
We don't need fully novel sequences. The original Spanish Flu strain sequence is published and well known. And you can always modify existing ones with known aspects (e.g. as in this infamous paper: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC114026/). And yes, it is more difficult to build an atomic bomb, as materials are thankfully expensive and difficult to obtain.