NATIONAL MEDICAL JOURNAL OF INDIA, vol.35, no.3, pp.189-190, 2022 (SCI-Expanded)
Cases of pneumonia of unknown aetiology occurred in the Wuhan city
of China in December 2019.1
It wasrevealed that the pathogenic agent
of pneumonia in these patients was ‘severe acute respiratory syndrome
coronavirus 2’ (previously known as 2019-nCoV).2
In February 2020,
this disease was identified by the WHO as coronavirus disease 2019
(Covid-19).3 The pandemic was declared on 11 March 2020, as the
disease continued to spread rapidly and began to appear in the USA,
and in parts of Europe. Covid-19 was a new virus and little was known
about it. Guidelines were updated in the light of new information and
experiences gained everyday. Further updates have continued in the
coming months and years.