 
 <translate> To answer this question, we should know that: The 1918 flu pandemic (January 1918 -- December 1920) was an unusually deadly influenza pandemic, the first of the two pandemics involving H1N1 influenza virus. The answer is H1N1 influenza virus. <hau> Don amsa wannan tambayar, ya kamata mu san cewa: Cutar mura ta 1918 (Janairu 1918 - Disamba 1920) wata annoba ce ta mura mai kisa, ta farko daga cikin annoba biyu da suka shafi kwayar cutar mura H1N1. Amsar ita ce kwayar cutar mura ta H1N1. 