can anyone give me tips on how to write an essay on jonas salk's work on polio my professor said that i needed 2-4 subtopics.

The first step is always to gather information. Since this is not my area of expertise, I searched Google under the key words "Jonas Salk polio" to get these possible sources:

http://www.pbs.org/wgbh/aso/databank/entries/dm52sa.html
http://www.achievement.org/autodoc/page/sal0bio-1
http://www.time.com/time/time100/scientist/profile/salk.html
http://www.accessexcellence.org/AE/AEC/CC/polio.html
http://en.wikipedia.org/wiki/Jonas_Salk

Subtopics can include personal biography, education, what brought him into the particular field, how he went about researching the vaccine, history of polio, criticisms of his work or other topics.

I hope this helps. Thanks for asking.

To write an essay on Jonas Salk's work on polio, you can start by organizing your essay into subtopics. Here are some suggestions:

1. Biography of Jonas Salk: In this section, you can provide an overview of Jonas Salk's background, including his early life, education, and any significant influences that shaped his career.

2. The history of polio: This subtopic can focus on providing a brief background on the disease itself, including its prevalence and impact on society before Salk's work.

3. Polio vaccine development: This section can explore how Jonas Salk approached the research and development of the polio vaccine. You can discuss his methods, experiments, and the scientific breakthroughs that contributed to the vaccine's success.

4. Impact and implications of the polio vaccine: Here, you can delve into the effects of Salk's work on the world, including the significant reduction in polio cases and the public health implications of the vaccine.

5. Controversies and criticisms: Finally, you can discuss any controversies or criticisms surrounding Salk's work, such as debates about intellectual property rights, vaccine safety concerns, or differing approaches to polio eradication.

Remember to use credible sources when researching each subtopic. You can refer to the sources I provided earlier, such as the PBS website, the Achievement website, Time magazine's profile, the Access Excellence website, or even Wikipedia. However, always cross-reference information and ensure its reliability.

Once you have gathered sufficient information on each subtopic, you can start writing your essay by introducing Jonas Salk and his significance in the field of polio research. Then, proceed to discuss each subtopic in a logical and organized manner, providing evidence, examples, and references to support your claims.

Don't forget to include proper citations and a bibliography at the end of your essay. Good luck with your writing!