Rules are hazy at best on this one, and it's also mutated in to the boot... this stuff is vicious, the rules in London Falling are as follows:
Mutated FAB III: [Vector Inhalation, Speed 12 hours (3),
Penetration 1, Power 13S, Nature Bacterial, Effects: Stun
Damage, Nausea, Disorientation]
If they have a
medical kit, assume that they have access to antibiotics at the
Rating of the kit. If they have a Doc Wagon contract, assume
they can get spirited away to a medical clinic and receive Rating
6 antibiotics and the situational bonuses associated with
ideal care.
Making the Toxin Resistance Test (SR5, p. 408):
Exposed victims make a Body + Willpower + the Rating
of any protective systems, implants, etc. Every hit reduces
the
power of the toxin by 1. If hits reduce the Power of the
toxin to 0, the disease takes no effect; otherwise, refer to the
full symptom description below.
If the pathogen’s Power is not reduced to zero, it is added
to the pathogen’s Power when rolling subsequent Toxin
Resistance Tests. The Power accumulates in this manner for
6 resistance tests. After 6 Toxin Resistance Tests, the Power
has peaked and will grow no more. The effects of the toxin
continue until its Power is reduced to zero.
Symptoms:
• Stun Damage: The runner suffers a pounding headache
and a stiff neck. Must resist toxin Power (
Base 6)* Stun.
• Malaise: If the current toxin Power is equal or less
than Body, the runner suffers a –1 to all actions. If it is
greater, –2 to all actions.
• Disorientation: –2 to all actions until the toxin Power
is reduced to zero.
*So the stun you thought you had isn't necessarily what you get...errr I think... you need a separate roll?!?
Anyway, the shit is going to hit the fan before the 12 hours are up so we can resolve all this later

I've had a look at the 2076 Google map and added what I think might be a suitable location in Harrow...feel free to disagree but it seems to fit the description Dire gave?!?