CO2 fractional laser, how quickly will the wounds close? I'm 1 day post op.

This is difficult to answer without pictures. I recommend following up with a cosmetic dermatologist for a formal evaluation and after care recommendations. I recommend skin care with vitamin c, b5 hydrator, silicone based scar gels with growth factors and enzymatic washes with papaya enzyme to give improvement. Sun protection is essential. Lasers like Co2 work best in combination with other treatments in order to improve the skin's texture and collagen. After Co2, I recommend adding fraxel lasers, microneedling/prp and radiofrequency treatments. Best, Dr. Emer

Thank you for your question.  Scars are best treated with combination therapies, like lasers + microneedling + topicals products like silicon gels.  If you are concerned about the risk of infection, please follow up with the Board Certified Dermatologist who treated you so they can properly manage you.  Regards, Dr. Matt Elias