Regarding who and how many people are allowed in the room during medical visits, here's how it's playing out here:
One person allowed in with a laboring mother. Early on in the pandemic, that person was allowed to leave and return, but no substitutions allowed if that one person couldn't get back in. (Like if the father had to leave and someone else wanted to step in.) I'm not sure if that's still the same now, I've heard that some hospitals and birthing centers have moved to only allowing one person in and if that person left before the mother and baby were released, they can't go back.)
Everyone except the mother and newborn baby have to be masked at all times.
For parents taking a child to the doctor, only one parent or caregiver is allowed in. For the pediatrition my daughter uses, parents are encouraged to use remote visits if possible. For instance, my daughter wanted advice on a diaper rash that rose up suddenly and didn't respond to the usual treatment. Since she had the ability to do it remotely, she talked to the doctor, showed what the rash looked like. Doctor said the rash was a yeast infection, use over the counter athletes cream and call back if necessary.
For inoculations or visits that can't be taken care of remotely, she pulls up outside the doctors office and calls the reception desk. A masked employee comes out to verify insurance and payment information, discuss what the appointment is about, and gather any information the parent would like the doctor to be aware of ahead of time. Then daughter waits in the car until the office calls back, and she immediately is shown shown to an exam room to wait for the doctor. All clinic employees are masked and gloved, and socially distance as much as possible, with the exam room thoroughly cleaned between each visit.