@cindiwass I think current research, once published about length of time of exposure + quantity of virus required, will begin to set our minds at ease a bit. Dr Michael Osterholm, a respected epidemiologist, has convened a task force of varied experts to compile & review all the data on aerosol transmission - they expect to have preliminary conclusions within 30 days.

That said, based on what we already know, a single touch of the face pretty surely won't transfer enough viable virus particles to infect you. And remember - virus particles are like barnacles, not flies - they stay where they land, and cannot move on their own. So if they are on your face, the only way to get into you mouth or nose is if you put them there by putting fingers in eye, nose or mouth. What I do is open the car door, use hand sanitizer before I get in the car, remove my mask, and sanitize again after I remove it - that way I avoid putting any virus from hands onto steering wheel, controls, etc.

For those of you wearing gloves - PROPERLY remove and discard gloves before getting in the car - otherwise all the contamination on the gloves comes along with you.
See:
https://www.cdc.gov/vhf/ebola/pdf/poster-how-to-remove-gloves.pdf
They are meant for single use and disposal, not to be taken on & off. If you cannot do this, you are better off without gloves and using handwashing/hand sanitizer. If you put on gloves when you leave home, go on your errands without removing, and take them off when you get home, you are carrying virus from place to place, into your car, and back home again.

Remember that the main vector of infection is inhalation, so caution about going to the dentist is reasonable because we sit with mask off and mouth open. However, before reopening, our dental office improved their ventilation, and are taking the added precaution of alternating room use, so they don't have two patients back-to-back in the came cubicle. So I do feel safe going (first morning appt.)

Please folks, don't put off necessary lab work and doctor's appointments for chronic conditions based on fear, otherwise the long-term effects of this pandemic will be even worse! Use video appointments when possible, early-morning lab visits for safety, wear your mask & wash your hands.
Stay calm, stay safe.
Sue