Is Vaccine Idle free to play?

Yes, 100% free — no download, no account, no payment. Open your browser and play instantly.

Does it work on mobile?

Yes. The game uses HTML5 and runs on Chrome, Safari and Firefox on Android and iOS devices.

How do I save my progress?

Progress auto-saves to your browser's local storage. Avoid clearing browser data to keep your save file.

Can I play with a friend?

Some modes support local 2-player on the same device. Check the main menu for multiplayer or co-op options.

The game is lagging — what can I do?

Close other browser tabs to free up memory, or try a different browser. Chrome generally provides the best performance for HTML5 games.

Vaccine Idle

game.aboutGame

Vaccine Idle is a mouse-only idle game to make your own vaccine and cures and save the world from the virus. After each win, you can upgrade your vaccine and make it better! Save the world as soon as you can. Buy doctors and sellers, sell cures to people, get money, and don't kill too many people. A fun, engaging browser game playable for free with no installation required — dive in and enjoy!