It took me about 6 months to mostly recover from Covid. My resting HR still is not back to normal. Joint pain is slowly resolving but still an issue. Sense of smell took 7 months. Normal breathing took 6 months as did 5 minute max power as did morning heart rate variability. I take a minimum of 10,000 IU D3 daily and have done so for 2 decades. I got it at a kid's birthday party last Fall and it was my only time in public for over 3 weeks. I avoided the inevitable for 3 years. With such a high R0, there is not effective precautions besides staying in the house.