[Grammar] the great era of..

[Rita93]

Hello
could you please help me!
Why the simple present is used in the following sentences although there is a date refers to the past ??
_Antibiotics: (1950) The great era of discovery of present-day antibiotics begins, and WHO begins advising countries on their responsible use.
_Polio: (1988) The Global Polio Eradication Initiative is established at a time when polio paralyzed more than 350 000 people a year.
Thanks

 

[Rover_KE]

Please tell us the source and author of your quoted text.

Click here to read about the historical present.

 

[Rita93]

I don't know who is the writer ,but this is the source,

http://www.un.org/en/sections/issues-depth/health/index.html

 

[emsr2d2]

I don't know who [STRIKE]is[/STRIKE] the writer is (no comma here) but this is the source:

http://www.un.org/en/sections/issues-depth/health/index.html

See above. You didn't need a comma in your sentence but, when you do use a comma, put a space after it but not before it.

 

[Raymott]

"Why the simple present is used?"

"Why is the simple present used?"