Yes, baby can get vertical and direct infection. To avoid infection maintain proximity to nature, do not oppose nature.
(1) Use nothing too hot in cold weather and use nothing too chilled in hot weather
(2) Refrain from antipyretic and analgesic medicines except in case of high grade fever.
(3) Avoid perfumes, scented soap, shampoo and other such Hazardous items like Woolen clothing and other animal dander.