There is no one definitive answer to this question. Some people seem to experience a temporary increase in brain fog during the early stages of Covid-19 infection, while others do not seem to be affected. There is no evidence yet to suggest that the brain fog caused by Covid-19 will go away once you are cured of the infection, but this is an area that requires further study.
If you are experiencing difficulties with focus and concentration due to Covid-19, there are some things that you can do to help improve your symptoms. Firstly, make sure that you are getting enough rest and relaxation. Taking regular breaks from work or studying can help to give your brain a chance to recharge. Secondly, try to keep your environment as organized and distraction-free as possible. Getting rid of clutter can help reduce cognitive distractions and allow you to focus better on the task at hand. Finally, make sure that you are taking care of your body by eating healthy foods and exercising regularly.