The Thymus Gland, Children, & Pandemics

It is a scientific fact that children are far less at risk for infection by the COV|ID-19 virus than those past puberty.

It is a scientific fact that such resistance (Immunity?) to diseases is a product of the THYMUS GLAND which begins to atrophy at that "interesting" age.

Although not a medical doctor or a scientist in some, related, area of knowledge I must wonder if the synthetic equivalent of the products of children's thymus glands might offer a sound and safe treatment-of or, even, immunity-to the cited virus (Or, others which have or can become pandemics.