Delhi reported its first death due to dengue this year, South Delhi Municipal Corporation (SDMC) sources informed several news outlet.

According to the data published by SDMC, a total of 723 cases of dengue have been recorded so far in 2021.

In October, the national capital saw a total of 382 new dengue cases, 29 cases of malaria and 13 cases of chikungunya.

Dengue virus (DENV) causes fever and haemorrhagic symptoms. DENV-2 is associated with more severe diseases.

Dengue infections are caused by four closely related viruses named DEN-1, DEN-2, DEN-3, and DEN-4. These four viruses are called serotypes because each has different interactions with the antibodies in the human blood serum.

The four DENV serotypes mean that it is possible to be infected four times. Dengue season begins post-monsoon and stays till the onset of winter.