www.cdc.gov: Readability — week 2026-W40
What these mean
- Words per page
- Main-content word count.
- Reading ease (Flesch)
- 0–100; higher is easier. ~60+ is plain language; below ~30 is very hard.
- Grade level (Flesch-Kincaid)
- US school grade needed to read it; aim for ~8 or lower for the public.
- Scored
- A reading grade is only meaningful on running prose, so we score a page only when it has enough of it. Pages that are mostly links or cards (too little text) or mostly tables and data (not prose) are left unscored — a grade there would be misleading, no matter how many words they contain.
Per-page readability
Unexplained acronyms
CDC— 499 page(s)MMWR— 238 page(s)PDF— 205 page(s)MD— 162 page(s)DC— 159 page(s)GA— 155 page(s)HTML— 151 page(s)US— 136 page(s)MPH— 125 page(s)URL— 101 page(s)ASCII— 99 page(s)PCD— 99 page(s)HOME— 99 page(s)ABOUT— 99 page(s)SEARCH— 90 page(s)
Possible misspellings
LinkedIn— 303 page(s)cdc— 295 page(s)www— 161 page(s)mmwrq— 153 page(s)http— 124 page(s)https— 84 page(s)MailStop— 80 page(s)Healthand— 80 page(s)Zoonotic— 70 page(s)htm— 66 page(s)Espa— 55 page(s)espa— 50 page(s)doi— 50 page(s)Archivo— 49 page(s)meros— 49 page(s)los— 49 page(s)pcd— 45 page(s)Altmetric— 42 page(s)del— 41 page(s)Prev— 40 page(s)Mendeley— 38 page(s)PDFLanguage— 36 page(s)html— 35 page(s)Nonopioid— 34 page(s)epidemiologic— 32 page(s)