Cover of Lost Immunity by Daniel Kalla

Book review by Corey

Lost Immunity

Thriller, Mystery, Contemporary Fiction

Book Score8out of 10
Plot & Storyline 8/10
Characters 7.5/10
Dialogue / Writing Style 8/10

Lost Immunity follows Seattle public health officer Lisa Dyer after a deadly strain of meningitis starts spreading through children and teenagers. With the death toll climbing, she pushes for early access to an experimental vaccine that looks like it might actually stop the outbreak. Then vaccinated patients start dying in horrifying ways, and suddenly everyone is questioning whether the cure is causing more damage than the disease.

I got pulled into this pretty quickly because the medical side feels believable without becoming impossible to follow. Every time it looked like the situation was finally under control, something else went wrong, and I kept wanting to know whether the vaccine was really the problem or if something else was going on. A few developments felt a little convenient, but the outbreak, public panic, and pressure around making huge medical decisions kept me invested.

The Goods

  • Strong medical-thriller setup
  • Good sense of urgency
  • The science stays easy to follow
  • Interesting vaccine mystery
  • Public-health pressure feels believable

The Bads

  • A few twists feel convenient
  • Some characters need more depth
  • Certain parts slow down
  • A couple reveals are easier to guess
  • The medical debate can get repetitive

My Recommendation

This is a good fit if you like medical thrillers, outbreak stories, and mysteries where doctors and public-health officials are forced to make huge decisions before they have all the answers. I liked that the story wasn’t just about stopping a disease, because once the vaccine itself comes under suspicion, everything gets much messier. If you enjoy fast contemporary thrillers with medicine, public panic, conspiracy, and a constant question of who or what is actually responsible, Lost Immunity is worth picking up.

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