TY - GEN AU - Grant,William B AU - Cannell,John J TI - Pregnant women are at increased risk for severe A influenza because they have low serum 25-hydroxyvitamin D levels SN - 1530-0293 PY - 2010///0927 KW - Female KW - Humans KW - Influenza A virus KW - isolation & purification KW - Influenza, Human KW - blood KW - Pregnancy KW - Pregnancy Complications, Infectious KW - Risk Factors KW - Vitamin D KW - analogs & derivatives N1 - Publication Type: Letter; Comment UR - https://doi.org/10.1097/CCM.0b013e3181e28603 ER -