When a person becomes infected with a norovirus, the virus begins to multiply within the small intestine. After approximately 1 to 2 days, norovirus symptoms can begin. This period between the norovirus transmission and the start of symptoms is the  norovirus incubation period ..In some cases, the norovirus incubation period can be as short as 12 hours.his period between the norovirus transmission and the start of symptoms is the  norovirus incubation period .. In some cases, the norovirus incubation period can be as short as 12 hours.
Drug type: Fluorouracil is an anti-cancer (antineoplastic or cytotoxic) chemotherapy drug. Fluorouracil is classified as an antimetabolite.. (For more detail, see How Fluorouracil Works section below). What Fluorouracil Is Used For: 1  Colon and rectal cancer. 2  Breast cancer.
Antivirals are medications that help fight flu, according to the Centers for Disease Control and Prevention. They're available only with a prescription from a health care professional. Antiviral drugs work against viruses; they don't fight bacteria like antibiotics do.The two antivirals used as flu treatments are oseltamivir phosphate (Tamiflu) and zanamivir (Relenza).ntivirals are medications that help fight flu, according to the Centers for Disease Control and Prevention. They're available only with a prescription from a health care professional. Antiviral drugs work against viruses; they don't fight bacteria like antibiotics do.