Q.SARS-CoV-2, the virus responsible for COVID-19, primarily infects and causes disease mainly in which human system?
(A) Digestive system
(B) Respiratory system
(C) Skeletal system
(D) Excretory system

SARS-CoV-2 spreads mainly through respiratory droplets and aerosols and primarily infects and causes disease in the respiratory system — SARS itself stands for Severe Acute Respiratory Syndrome, directly naming the system affected. Symptoms range from mild (fever, cough, sore throat) to, in a smaller proportion of cases, severe breathlessness that can require medical care. While the digestive, skeletal, and excretory systems (options A, C, D) are not the primary sites of infection or disease for this virus, only the respiratory system correctly matches bo …

Use the full name of the disease itself as a direct clue — 'Severe Acute Respiratory Syndrome' names the affected system explicitly, so the …

Do not select the digestive system simply because some patients report occasional gastrointestinal symptoms — the primary and defining site of SARS-CoV-2 infect …