Alzheimer's Disease (AD) is a progressive neurological disorder that predominantly affects the elderly, leading to memory loss and cognitive decline. It is the most common cause of dementia, impacting millions worldwide, with profound effects on patients and their caregivers. The disease gradually strips away the ability to carry out the simplest tasks.

Anemia is a condition characterized by a deficiency in the number or quality of red blood cells, which are crucial for transporting oxygen throughout the body.

Angina, a symptom of coronary artery disease, manifests as chest pain due to reduced blood flow to the heart. Understanding angina is crucial for heart health as it often precedes heart attacks. Recognizing angina's warning signs can lead to early intervention, potentially saving lives. It's a vital indicator of underlying heart issues, emphasizing the need for awareness and timely medical response.

Anthrax, a serious infectious disease caused by the bacterium Bacillus anthracis, affects both humans and animals. With a history dating back to ancient times, it has been a feared biological threat.