What is the causative agent of COVID-19?

Correct option is B

COVID-19 is caused by the SARS-CoV-2 virus, a member of the coronavirus family. It spreads primarily through respiratory droplets and surface contact, leading to symptoms like fever, cough, breathing difficulties, and loss of taste or smell.
Explanation of Each Option:
· Bacteria: Incorrect; COVID-19 is viral, not bacterial. Antibiotics do not work against it.
· Virus: Correct answer; SARS-CoV-2 is a virus that caused the global pandemic.
· Fungus: Fungal infections (e.g., Mucormycosis) were seen in COVID-19 patients, but the disease itself is viral.
· Protozoa: Protozoan infections (e.g., malaria) are caused by parasites, not COVID-19.