Liver function tests. Liver function tests (LFTs or LFs) are groups of blood tests that give information about the state of a patient's liver.[1] These tests include prothrombin time (PT/INR), aPTT, albumin, bilirubin (direct and indirect), and others.
This is unusual since influenza is normally most deadly to the very young (under age 2) and the very old (over age 70). The total mortality of the 1918â1919 pandemic is not known, but it is estimated that 2.5% to 5% of the world's population was killed.
Alternative Titles: Spanish flu, Spanish influenza pandemic Influenza pandemic of 1918â19, also called Spanish influenza pandemic or Spanish flu, the most severe influenza outbreak of the 20th century and, in terms of total numbers of deaths, among the most devastating pandemics in human history. 1  Influenza is caused by a virus that is transmitted from person to person through airborne respiratory secretions.