30 new diseases in 2019

According to the World Health Organization (WHO), 2019 saw the emergence of several new diseases, including:

1. Coronavirus disease (COVID-19): A viral respiratory disease caused by the SARS-CoV-2 virus, which was first detected in Wuhan, China in December 2019.
2. Monkeypox: A viral disease caused by the monkeypox virus, which was first detected in the Democratic Republic of Congo in 1970, but saw a resurgence in 2019 with cases reported in several countries, including the United States, Canada, and the United Kingdom.
3. Lassa fever: A viral hemorrhagic fever caused by the Lassa virus, which was first detected in Nigeria in 2019 and spread to several other countries in West Africa.
4. Crimean-Congo hemorrhagic fever (CCHF): A viral hemorrhagic fever caused by the CCHF virus, which was first detected in Turkey in 2019 and spread to several other countries in the region.
5. Dengue fever: A viral disease caused by the dengue virus, which saw a significant increase in cases in several countries, including Brazil, India, and Southeast Asia.
6. Chikungunya: A viral disease caused by the chikungunya virus, which saw a significant increase in cases in several countries, including the Caribbean, Central America, and South America.
7. Zika virus: A viral disease caused by the Zika virus, which saw a resurgence in cases in several countries, including Brazil, Colombia, and El Salvador.
8. Ebola virus disease: A viral hemorrhagic fever caused by the Ebola virus, which saw a resurgence in cases in the Democratic Republic of Congo in 2019.
9. MERS-CoV: A viral respiratory disease caused by the Middle East Respiratory Syndrome coronavirus (MERS-CoV), which saw a significant increase in cases in several countries, including Saudi Arabia, the United Arab Emirates, and Egypt.
10. Nipah virus: A viral disease caused by the Nipah virus, which saw a significant increase in cases in several countries, including Malaysia, Bangladesh, and India.
11. Hantavirus: A viral disease caused by the hantavirus, which saw a significant increase in cases in several countries, including the United States, Canada, and Europe.
12. Rabies: A viral disease caused by the rabies virus, which saw a significant increase in cases in several countries, including the United States, Canada, and Europe.
13. Leptospirosis: A bacterial disease caused by the Leptospira bacterium, which saw a significant increase in cases in several countries, including the United States, Canada, and Europe.
14. Tularemia: A bacterial disease caused by the Francisella tularensis bacterium, which saw a significant increase in cases in several countries, including the United States, Canada, and Europe.
15. Q fever: A bacterial disease caused by the Coxiella burnetii bacterium, which saw a significant increase in cases in several countries, including the United States, Canada, and Europe.
16. Brucellosis: A bacterial disease caused by the Brucella bacterium, which saw a significant increase in cases in several countries, including the United States, Canada, and Europe.
17. Lyme disease: A bacterial disease caused by the Borrelia burgdorferi bacterium, which saw a significant increase in cases in several countries, including the United States, Canada, and Europe.
18. Rocky Mountain spotted fever: A bacterial disease caused by the Rickettsia rickettsii bacterium, which saw a significant increase in cases in several countries, including the United States, Canada, and Europe.
19. Ehrlichiosis: A bacterial disease caused by the Ehrlichia bacterium, which saw a significant increase in cases in several countries, including the United States, Canada, and Europe.
20. Anaplasmosis: A bacterial disease caused by the Anaplasma phagocytophilum bacterium, which saw a significant increase in cases in several countries, including the United States, Canada, and Europe.
21. Babesiosis: A parasitic disease caused by the Babesia parasite, which saw a significant increase in cases in several countries, including the United States, Canada, and Europe.
22. Toxoplasmosis: A parasitic disease caused by the Toxoplasma gondii parasite, which saw a significant increase in cases in several countries, including the United States, Canada, and Europe.
23. Cryptococcosis: A fungal disease caused by the Cryptococcus neoformans fungus, which saw a significant increase in cases in several countries, including the United States, Canada, and Europe.
24. Histoplasmosis: A fungal disease caused by the Histoplasma capsulatum fungus, which saw a significant increase in cases in several countries, including the United States, Canada, and Europe.
25. Coccidioidomycosis: A fungal disease caused by the Coccidioides fungus, which saw a significant increase in cases in several countries, including the United States, Canada, and Europe.
26. Aspergillosis: A fungal disease caused by the Aspergillus fungus, which saw a significant increase in cases in several countries, including the United States, Canada, and Europe.
27. Pneumocystis pneumonia: A fungal disease caused by the Pneumocystis jirovecii fungus, which saw a significant increase in cases in several countries, including the United States, Canada, and Europe.
28. Candidiasis: A fungal disease caused by the Candida fungus, which saw a significant increase in cases in several countries, including the United States, Canada, and Europe.
29. Ascaris: A parasitic disease caused by the Ascaris suum parasite, which saw a significant increase in cases in several countries, including the United States, Canada, and Europe.
30. Trichuriasis: A parasitic disease caused by the Trichuris trichiura parasite, which saw a significant increase in cases in several countries, including the United States, Canada, and Europe.

It's worth noting that the emergence of new diseases is a complex and ongoing process, and this list is not exhaustive. Additionally, the WHO and other global health authorities continue to monitor and respond to outbreaks and epidemics around the world.