Vog is a mixture of sulfur dioxide and other gases that combine with atmospheric oxygen, moisture, dust, and sunlight, resulting in a ‘hazy mixture’ that diminishes visibility in affected areas, according to the Philippine Institute of Volcanology and Seismology (PHIVOLCS).
Whooping cough, or pertussis, is a very contagious respiratory infection caused by the bacteria called Bordatella pertussis which can be easily spread through coughing or sneezing.