Probably, but the more special treatment you need, the tougher it is to get. Your boss or company has to make small changes to your job as long as you can still do the important parts of the job. So, for example, if you need to see your doctor at what is usually work time, your boss has to let you unless the job has to be done at that particular time. The bigger your company, the more likely it is that the company will have to adjust. The bigger the changes you need, the more likely it is that the company won't have to adjust.

To get time off, do I have to tell my boss or company I have AIDS or HIV?
Maybe not. You can say you have a medical condition, and that your doctor will back you up in a note. Lots of companies don't want more information. Some laws say that they can't ask for more.

What if I am so sick, I can't do the job?
Your company or boss doesn't have to give you a job or keep you in a job if you can't do that job. There is a national law (the Family Medical Leave Act) that might require the company to keep the job open for you until you can return to work, at least for a few months. In some places, the company may have to keep paying you for a while. If you can't work, you should consider applying for disability. Some jobs have private disability insurance. Many states do, and you should apply for Social Security. Your nearest AIDS/HIV agency should be able to help you figure this out.