Yes, cancer is still considered to be one of the deadliest diseases for humans. According to the World Health Organization (WHO), cancer is responsible for approximately 1 in 6 deaths worldwide, making it the second leading cause of death globally.
The diagnosis procedures for different respiratory problems will vary depending on the specific condition. It's important to note that not everyone will be allergic to the same things, and symptoms can vary from person to person. If you suspect you have an allergy, it is best to see an allergist or immunologist for a proper diagnosis and treatment.