Pertussis (whooping cough) is a dangerous infectious disease that causes acute respiratory distress, attacks of chronic cough, breathing problems, and can even lead to death in infants. Pertussis vaccination is mandatory, and the vaccination cycle is carried out in the first months of a child's life. To protect an infant from the first days of life, it is recommended that pregnant women receive the pertussis vaccination in the second trimester of pregnancy. This allows the antibodies produced by the mother to enter the baby's body through the placenta and help the baby develop its own natural immunity.