I loved the Bobiverse books and this story does not disappoint. The nanotech capabilities and limitations were poorly defined so parts of the story were a little too deus est machina, (contrived) but the characters and story line were great, 4/5 Stars.
On March 6, when Gilead Sciences announced clinical trials of their anti-viral medication Remdesivir, I bought shares in their stock (and yes, it is up). Coincidentally, one of my children had an assignment at University to model how the medication (Remdesivir) binds to SARS-CoV-2.