Skip to Main Content

Lost Immunity

A Thriller

About The Book

*Instant National Bestseller

In this explosive new thriller from international bestselling author Daniel Kalla, an experimental vaccine is deployed to battle a lethal outbreak—until patients start dying of unknown causes.

An ordinary day
The city of Seattle is stunned when a deadly bacteria tears through a nearby Bible camp. Early tests reveal the illness is a form of meningitis, and the camp’s residents are among its most vulnerable victims: children and teenagers.

A new vaccine
Facing a rapidly rising death rate, Seattle’s chief public health officer, Lisa Dyer, and her team quickly take all steps necessary to contain the devastating outbreak. And when further testing reveals that the strain of the bacteria is one that caused catastrophic losses in Iceland six months before, Lisa decides to take a drastic step: she contacts Nathan Hull, vice president of a pharmaceutical company that is doing final-phase trials on a viable vaccine, and asks him to release it early for use on the city’s population.

An epidemic in the making
Lisa gets the go-ahead on her controversial plan, despite the protests of dubious government officials, anti-vaxxers, and even those on her own team. Vaccine clinics roll out across the city, and the risky strategy appears to be working, leaving Lisa, Nathan, and thousands of others breathing a sigh of relief. Until people start dying from mysterious and horrific causes—and the vaccine itself is implicated.

But what if science isn’t to blame?

About The Author

Michael Bednar Photography

Daniel Kalla is an internationally bestselling author of many novels, including Fit to Die, The Darkness in the Light, Lost Immunity, The Last High, and We All Fall Down. Kalla practices emergency medicine in Vancouver, British Columbia. Visit him at or follow him on Twitter @DanielKalla.

Product Details

  • Publisher: Simon & Schuster (May 4, 2021)
  • Length: 352 pages
  • ISBN13: 9781982150167

Browse Related Books

Raves and Reviews

Praise for Lost Immunity

Kalla ratchets up the suspense as a cover-up is exposed . . . a truly scary scenario from a writer who knows his medical thriller lingo down to the final line.”
The Globe and Mail

“Kalla . . . has a knack for writing eerily prescient thrillers.”
CBC Books

A fast-paced, fact-filled medical thriller that reads like the anatomy of an epidemic . . . also a fine tribute to the dedicated public officials and front line workers who put everything on the line towards the race to eradicate a quickly spreading epidemic.”
Montreal Times

Always there to hold up a mirror to society—his last book, The Last High, took on the opioid crisis—Kalla’s new Lost Immunity book sits smack dab in the middle of what the world has been going through for the last year.”
Vancouver Sun

Praise for The Last High

“Kalla has long had his stethoscope on the heartbeat of his times. . . . In his latest, the focus is on Vancouver’s opioid crisis. . . . [A] lively story.”
Toronto Star

“A thrilling, front-line drama about the opioid crisis.”
KATHY REICHS, bestselling author of the Bones series

“If you want an engrossing, edge-of-your-seat thriller that combines good detective work, corruption, savage criminal practices, a dark, seamy portrait of a large Canadian city, and a hard-hitting lesson on the medical and emotional effects of opioid drugs, then The Last High certainly fills that prescription.”
Montreal Times

“Kalla is terrific at building suspense as the case progresses, uncovering a web of dealers, sellers, and users.”
The Globe and Mail

A riveting thriller, The Last High features the most evil and insidious of villains: opioids. This important, must-read book is not only well-researched and entirely realistic, it gives a human face to a devastating epidemic.”
— ROBYN HARDING, #1 bestselling author of The Swap

An exciting police/medical thriller that’s an even better sociological alarm bell . . . everything feels real.”
Winnipeg Free Press

“A sobering glimpse into the drug overdose crisis. . . . An entertaining, if slightly eerie read.”
Vancouver Sun

Resources and Downloads

High Resolution Images

More books from this author: Daniel Kalla