Coronavirus test in New Delhi April 2, 2021 by Press Trust of India New Delhi: A health worker collects a nasal sample from a passenger for COVID-19 test, amid coronavirus pandemic, in New Delhi, Friday, April 2, 2021. (PTI Photo/Kamal Kishore) New Delhi: A health worker collects a nasal sample from a passenger for COVID-19 test, amid coronavirus pandemic, in New Delhi, Friday, April 2, 2021. (PTI Photo/Kamal Kishore) New Delhi: A health worker organizes samples from passengers for COVID-19 test, amid coronavirus pandemic, in New Delhi, Friday, April 2, 2021. (PTI Photo/Kamal Kishore) New Delhi: A health worker collects a nasal sample from a passenger for COVID-19 test, amid coronavirus pandemic, in New Delhi, Friday, April 2, 2021. (PTI Photo/Kamal Kishore)