The idea of his prediction and the timing is pretty impressive. It was 1981 and who is to say the weapon was not enhanceD and changed. A virus can be a bioweapon.
The Hunt for Red October was required reading where I worked - we even had classified information training on what we couldn't say about submarine sonar systems even though the information was broadly hinted at in the book. Then after a few good books, Clancy's jumped the shark - I didn't read anymore after that - and it turned out he didn't really write them either, instead hiring a team of ghostwriters who developed the plot lines and characters he invented.Sort of like Tom Clancy's book where terrorists crash a plane into the Capitol building. The FBI interviewed him after 911.