I may have expressed that somewhat ambiguously. The AIDS is an exception to the 3 year rule of reporting all deaths:

AIDS Brings Another Twist to Disclosure Rules

If the death had taken place within three years, the law is not as clear. If the property had been the site of a sensational murder or something similar that affects the value of the property, it must be disclosed. Short of that, a lawyer may or may not advise disclosure.

However, if the cause of death was AIDS or an AIDS-related illness, the seller has no obligation to disclose the information at any time under the law.