They discovered to the world the variant of covid-19 known as omicron.
They alerted to the existence of delta and revealed the characteristics of alpha after it was detected for the first time.
Microbiology laboratories study the evolution of the virus through sophisticated genome sequencing techniques.
In Madrid, there are four centers that can dedicate themselves to this important work to monitor the circulation of the virus.
Pau Mosquera was in two of them and brings us the details.