The winter flu
In this episode, Letícia Sarturi, a scientist with expertise in immunology and biochemistry, addresses a common belief that exposure to cold or rain can lead to catching a cold or the flu. She explains that these illnesses are caused by viruses, such as the influenza virus for the flu and rhinoviruses for the common cold. While cold weather itself does not directly cause illness, winter conditions often lead to increased indoor crowding with insufficient ventilation, which facilitates the transmission of respiratory viruses. Letícia highlights that during colder months, people tend to stay indoors, which can trap airborne viral particles, raising the likelihood of infection. Additionally, cold temperatures may weaken the immune response, thereby increasing susceptibility to viruses. She emphasizes the importance of vaccination against influenza and proper hygiene practices, especially in public spaces where the risk of virus transmission is higher. While rain or being cold doesn’t inherently cause illnesses, exposure to low temperatures can lower body temperature, potentially impacting immune function and increasing the risk of viral infections.