Maybe the fastest shadow plague mega brutal speedrun in Youtube.
Based on the strategy on this site (Chinese): https://www.bilibili.com/video/av28368919
I optimized the travel path to make sure every developed country infected.
1. Don't leave NZ and Australia until 1 million people infected. Leave it ASAP when infected reached 1 million.
2. Stay in rich countries for 2 days, other countries for 1 days(2 days in Iceland cuz it has 323k people and 10 labs)
3:15 Trans-Atlantic Flight
4:30 Entering Northern Europe
4:57 1st WHO Lab Appears
6:24 Templar Industries Base Established
9:51 Templar Forces Eradicated
Au5 - Blossom https://soundcloud.com/monstercat/au5-blossom
Nitro Fun - New Game https://soundcloud.com/nitrofun/nitro-fun-new-game-1
DJVI - Dry Out https://www.newgrounds.com/audio/listen/498543
I don't own these music, just use'em 4 video BGMs cuz I don't like those music & SFXs in PI so I mute'em.