Pregnant women had a significantly increased natural killer cells that produced a response to the flu, compared to women not experiencing pregnancy before the vaccination, and the immune response was even more extreme after vaccination with the flu shot.
The marketing mix is a business tool used in marketing and by marketers. The marketing mix is often crucial when determining a product or brand's offer, and is often associated with the four P's: price, product, promotion, and place. In service marketing, however, the four Ps are expanded to the seven P's or Seven P's to address the different nature of services.
The term  marketing-mix was first coined by Neil Borden, the president of the American Marketing Association in 1953. It is still used today to make important decisions that lead to the execution of a marketing plan.