What is Disease X?

Disease X is referred to as a hypothetical pathogen or threat that can cause a major pandemic in future.

What is Disease X?
Table of Contents

About Disease X

  • It is referred to as a hypothetical pathogen or threat that can cause a major pandemic in future.
  • It could be a new agent, a virus, a bacterium, or a fungus without any known treatment.
  • The term coined by scientists and the World Health Organization could be any of the 25 families of viruses that have the capability to cause illness in people.
  • Disease X was included in the WHO’s updated Blueprint list of diseases back in 2018.
  • Scientists are of the opinion that Disease X could be 20 times more deadly than SARS-Covid virus that caused pandemic recently.
  • It represents an illness which is currently unknown but could pose a serious microbial threat to humans in the future.

Q1) What is a pandemic?

A pandemic is an outbreak of infectious disease that occurs over a wide geographical area and that is of high prevalence. A pandemic generally affects a significant proportion of the world’s population, usually over the course of several months.

Source: The pandemic treaty can help the world brace for Disease X: WHO Director-General

Update Icon
Latest UPSC Exam 2026 Updates

Date IconLast updated on August, 2026

UPSC Mains 2026 will be conducted on 21st, 22nd, 23rd, 29th and 30th August 2026.

→ Check out the latest UPSC Syllabus 2026 here.

UPSC Mains Admit Card 2026 is expected to be released in early August at upsc.gov.in or upsconline.nic.in

→ Enroll in Vajiram & Ravi’s UPSC Mains Test Series 2027 for structured answer writing practice, expert evaluation, and exam-oriented feedback.

→ Join Vajiram & Ravi’s UPSC Mentorship Program 2027 for personalized guidance, strategy planning, and one-to-one support from experienced mentors.

→ Go through the UPSC Mains Previous Year Papers to enhance your preparation.

→ Download UPSC Mains Essay Paper 2025, UPSC Mains GS Paper-I 2025, UPSC Mains GS Paper-II 2025, UPSC Mains GS Paper-III 2025, UPSC Mains GS Paper-IV 2025, UPSC Mains English (Compulsory) Paper 2025, UPSC Mains Hindi (Qualifying) Paper 2025 here.

→ UPSC has released UPSC Toppers List 2025 with the Civil Services final result on its official website.

UPSC Calendar 2027 has been released.

→ Also check Best UPSC Coaching in India

UPSC GS Course 2026
UPSC GS Course 2026
₹1,80,000
Enroll Now
GS Foundation Course 2 Yrs
GS Foundation Course 2 Yrs
₹2,45,000
Enroll Now
UPSC Mentorship Program
UPSC Mentorship Program
₹85000
Enroll Now
UPSC Sureshot Mains Test Series
UPSC Sureshot Mains Test Series
₹27000
Enroll Now
Prelims Powerup Test Series
Prelims Powerup Test Series
₹14000
Enroll Now
Enquire Now