Railey-During 1918 vaccine did not exist(vaccine- something that can fight off the virus). And had no clue how to stop the virus from spread. But during that time they thought of something that could maybe fight it off, called the special bratio spray chamber(the special spray chamber is a pipe that can spray zinc sulphate gas to people) . But years later they knew that it didn't have any effect (didn't kill the germs or flu). During 1918 4 years later people thought it was fine and Link to text: http://instructionalseries.tki.org.nz/content/download/41195/459530/file/SJL4_2018-Pandemic.pdf
Vaccine- are a little bit of the virus that is dead so your body can make antibodies that can fight off the virus.
Zinc Sulphate- a medicine
Formally improved -Approved from the Government
Medical Benefit- Helping your body fight.
Undoubtedly- probably, definitely
Spray inhalers - a gas you breathe in through your nose/mouth, think of an asthma inhaler.
benefit/beneficial - mean the same thing
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