When flu goes pandemic, it can be devastating National Museum of 午夜福利1000集合 and Medicine/SPL
Winter flu breaks out every year because small mutations in the flu virus let it dodge antibodies we made to protect us from the last flu we got. It isn鈥檛 totally different from that last flu, so we are partly immune, and the infection may be mild. But every now and then an influenza A virus breaks out carrying surface proteins that are very different. This 鈥減andemic鈥 flu spreads like wildfire regardless of the season 鈥 and often more, and younger, people die. Survivors do gain some immunity for next time, so the killer settles down and becomes regular seasonal flu, drifting along until the next pandemic flu surfaces.
Winter flu: All the essential facts you need to know
1) 1510
Strain: unknown
Deaths: unknown
The first record : 鈥済asping oppression鈥 with cough, fever and difficulty breathing rapidly spread across Europe after reportedly arriving from Asia via Africa. Similar events were recorded throughout the 1700s and 1800s.
2) 1889-1890 Asiatic or Russian flu
Strain: H3N8 or H2N2
Deaths: ~1 million
The first pandemic to be spread faster by railways and steamships was recorded in St Petersburg in December 1889. Within four months, it had gone global, . Antibodies in survivors , and so perhaps related to the H3N2 flu dominating in this northern hemisphere winter.
3) 1918-1920 Spanish flu
Strain: H1N1
Deaths: 50-100 million
The , and…
