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Increase the spread. Increase your bacteria's resistance. Wait for the world to become infected.
Once you start earning some DNA, you can work on increasing the transmission capabilities of the virus. Start by unlocking Water 1 and Air 1. These will increase your bacteria's ability to spread over boats and airplanes. Bacterial Resilience is an ability unique to bacteria. This will thicken the Bacteria's shell, making it more comfortable in all climates. Drug Resistance allows the bacteria to spread in more developed countries. Improve the transmission and evolve the following upgrades: Bacterial Resilience 1 Drug Resistance 1 Water 2 Air 2 Extreme Bioaerosol - This becomes available after maxing out Air and Water transmission. It gives a boost to both. Bacterial Resilience 2 and 3 This will probably take a while, so set the game speed to the fastest setting. Make sure to keep popping bubbles and devolving symptoms when they mutate. Once the entire population is infected, you will receive a message letting you know that there are no healthy people left. Time to unleash the symptoms!