Learn the rules for "fair use." For example:

https://en.wikipedia.org/wiki/Fair_use

There are also a lot of easy-to-understand college handbooks available on how to write informatively while avoiding plagiarism. For example:

Avoiding Plagiarism: Quoting and Paraphrasing

This is something most college students learn when they write their first research paper, and the principles are much the same for bloggers.

Marcia Yudkin

[DELETED]

If you can't come up with something original, why bother? Once something has already been said, it doesn't need to be said again.

A tsunami of useless content sweeps across the internet every nanosecond. The last thing we need is more of it (this reply included LOL).

Alex

I think you're misunderstanding copyright and plagiarism.

No, you cannot copy a sentence someone else wrote and claim it's original.

Yes, you can read sentences others wrote, formulate your own thought and sentence to describe said thought, and if you want extra karmic brownie points - cite/credit your sources.

Never underestimate the powera hooman invention.

Since the dawna time (or whenever it was we made switcha homo from erectus to sapiens) singular people been havin' singular thoughts 'bout stuff binds us all together.

Worst case scenario is, you write sumthin' out an' evryone is on it, cos you hit on sum facta the hooman condition an' spun it out via your own weirdsy lens had allure.

If you figure nah this gotta have been said before easiest resourceya got for checkin' stuff out is Google.

Slapya words in, an' ifya getta result — wordsya wrote, verbatim — mebbe tweak a little.

Plagiarismo is nuthin' to fluffya chest about, cos anyone can trot out combinationsa alpabetiture with no idea what the words mean — but I figure plagiarosmosis has a more diffuse feel.

Lotsa waysa hittin' on the same sensea sum idea.

Soluble on the way in.

Soluble on the way out.

Mutabilitya absolutes

for maxo singular clout.

(I am makin' this up, btw, but I wanna be halfways positive.)

Plagiarism and copyrighted right are important issues for article/content writing but you should know well about them and how to avoid them. You’re going to write on health and science and so you need to visit all health and science sites and gather data, not sentences and then write contents in your own way. You should not copy any data or sentence but you can use any figures or statictics and cite your data sources. And this will not be counted as Plagiarism and copyrighted problems.

All you need to do is search the Internet for your sources about a certain topic of interest. Most of the blogs and news you find have extracted sources from the Internet like journals and books. Search for those journals and books, read and the write what you understand from the contents. Be careful not to copy sentences but paraphrase them instead. If you copy contents like tables, etc make sure to cite the source of that data. Thats all.