www.cdc.gov: Readability — week 2026-W39
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— 890 page(s)MMWR— 403 page(s)PDF— 347 page(s)MD— 302 page(s)GA— 281 page(s)DC— 272 page(s)HTML— 259 page(s)US— 257 page(s)MPH— 236 page(s)URL— 183 page(s)PCD— 177 page(s)ASCII— 157 page(s)MS— 155 page(s)HOME— 150 page(s)ABOUT— 146 page(s)
Possible misspellings
LinkedIn— 561 page(s)cdc— 510 page(s)www— 300 page(s)mmwrq— 293 page(s)http— 232 page(s)https— 151 page(s)MailStop— 124 page(s)htm— 124 page(s)Zoonotic— 122 page(s)Healthand— 120 page(s)doi— 97 page(s)espa— 87 page(s)Altmetric— 84 page(s)Espa— 83 page(s)Archivo— 81 page(s)meros— 81 page(s)pcd— 76 page(s)mmwr— 74 page(s)Mendeley— 74 page(s)PDFLanguage— 71 page(s)Handwashing— 70 page(s)Prev— 70 page(s)los— 68 page(s)del— 67 page(s)html— 61 page(s)