Summarize the impact discoveries of the twentieth century had on the advance of healthcare

Public health measures such as pure food and water, and development of immunizations against many serious diseases such as polio and smallpox, coupled with enhanced economic conditions, are together credited with substantial reductions in the burden of infectious diseases.

like this.

answering: it is all very simple. after you join you find many questions in the main page. you can click on answer if you know, then there will be a box written 'know the answer? add it here'. click on that and start writing your answer. don't copy answers from the net!

questioning: there will be an option for asking questions too. click on 'ask your question'. write your question there and give the correct subject and the number of points.

you will get points when you answer and also lose points when you question. you will get new ranks with many points and brainliest answers.

to prevent people from getting the ebola virus, countries around the world paid to doctors develop a new vaccine. now that the vaccine has been made, doctors will need to experiment on a large number of people to find out if it works safely.

what is the greatest limitation that scientists are dealing with as they try to figure out how to experiment with the ebola vaccine?

meditation is a practice of sitting still and quiet for minutes or even hours. it has been practiced for thousands of years and is even a part of religious practices for some people. carefully controlled, repeated measurements of brain activity have shown that meditation does increase certain chemicals in the brain and even grows the part of the brain that people connect with their current surroundings and activities.

are claims about the effects of meditation most likely scientific or pseudoscientific?

not pseudoscientific, because people have made claims about it but scientific observations have not been made