LONDON (Reuters) - The 1918 Spanish flu that killed up to 50 million people worldwide caused a severe immune response which may help to explain why it was so deadly, American scientists said on Wednesday.>>> Discuss This Story
LONDON (Reuters) - The 1918 Spanish flu that killed up to 50 million people worldwide caused a severe immune response which may help to explain why it was so deadly, American scientists said on Wednesday.>>> Discuss This Story