I will keep this as brief as possible. This information is based on my OHS knowledge gained studying microbiology and biological sciences at university, with many hours working in PC-2 and PC-3 lab environments, including work with bacterial pathogens.

The current SARS-Cov2 pandemic is a real danger to rideshare drivers, their families and their riders. Drivers are exposed to many, sometimes dozens of people every day. Short of stopping driving completely and staying home until the crisis ends, these are practical steps you can take immediately, to mitigate the real risk of infection.
  • Don't spread the virus
    If you are presenting any cold or flu-like symptoms, stop driving immediately and seek medical help. I can't stress this enough! If you have symptoms and keep driving, you could literally kill people by continuing to drive. Nobody wants that kind of karma. Your need to pay a few bills on time does not outweigh the life of another human being.
  • Maintain personal hygiene.
    Wash your hands with soap before leaving home and immediately upon returning. Wash hands before and after going to the toilet, before and after eating, and whenever your hands are soiled. Wear a clean set of clothes every day. Shower before leaving home and immediately after returning home. Brush your teeth. Keep your hair and nails clean and trimmed. Breathe through your nose!
  • Get riders to sit in the back (not directly behind you)
  • Refuse multiple pax
    Cancel any rides with more than 2 pax or even 1 pax if practicable. Every additional pax is a multiplier of infection risk. Your CR statistic is not more important than your safety. Decline any and all Pool fares for the same reason.
  • Ventilate your car
    Always set your A/C to draw air from outside, not to recirculate. Keep windows rolled down if you can. After pax leave the vehicle, roll down all windows to allow complete ventilation of the cabin before the next trip.
  • Use hand sanitiser.
    Keep a bottle in your car. Use it whenever you touch anything outside your vehicle, or after you have performed any cleaning action on your car.
  • Clean your car.
    Wash your car at the hand carwash with the foaming brush and soap. Focus on the areas touched by riders like door handles, door edges etc. Vacuum the interior of your car, including seats, mats, under mats. Consider wearing a surgical mask or dust mask while doing this.
  • Disinfect your car (every day)
    Use antibacterial surface wipes to wipe down seats, backs of seats, inside surfaces of doors, door handles, window buttons, the dashboard, steering wheel and all dash and wheel buttons. If you can't get wipes because they have run out, you can use a spray bottle filled with isopropyl alcohol (5L bottle available on ebay for $46), also known as propanol. Spray the propanol onto the surface you wish to disinfect, leave it for up to a minute then wipe it off using a clean disposable cloth like chux. Ideally we could use something containing sodium hypochlorite and sodium hydroxide (like Exit Mould) - however this is likely to cause damage to the interior of your car especially fabrics, even when diluted. Stick with alcohol-based disinfectants. If you can't find alcohol, soak a cloth in water mixed with a tiny amount of dishwashing liquid (a couple of little squirts into a bucket). Use the soaked cloth to wipe down the surfaces, then use a dry cloth to wipe away.
  • Install a HEPA cabin air filter.

    like this one. It will reduce the circulation of virus particles in your car. This filter is similar to medical N95 masks in its performance.
  • Completely disinfect your car's A/C
    Aircon Kleen from Chemtech
    fumigates your car with 60% ethanol and 10% glutaraldehyde which is used in hospitals for disinfection. It will wipe out any bacteria, mould or viruses present in your A/C ducts as well as your car's interior surfaces and fabrics, leaving your car fresher than it's ever been. This doesn't need to be done more than once a month. Available at car accessories shops or online for around $30. It works very well.
  • Avoid hot zones.
    In many areas, some young people continue to go out clubbing, partying, and pub crawling, and generally ignoring all pleas by public health authorities to avoid crowds. These irresponsible carrier monkeys represent a major public infection risk. If you have been driving for any length of time, you know the times and places when and where they congregate. Do us all a favour and don't pick up from those areas.
That's it for now. Please note I haven't recommended wearing PPE such as masks and gloves. While proper use of n95 masks and gloves will definitely protect the driver, I can't in good conscience recommend that drivers seek these items, while our health services are struggling to find enough PPE for doctors and nurses who are truly on the front line of this terrible pandemic. If these items become readily available, by all means get them, educate yourself on their proper use, and go full hazmat if you want.