Tools & Wizards About Us
vaccineinformation.org screenshot

Report Summary

  • 51

    Performance

    Renders faster than
    69% of other websites

  • 55

    Accessibility

    Visual factors better than
    that of 23% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 62

    SEO

    Google-friendlier than
    22% of websites

vaccineinformation.org

VaccineInformation.org | Vaccination Saves Lives!

Page Load Speed

2.8 sec in total

First Response

552 ms

Resources Loaded

1.7 sec

Page Rendered

514 ms

vaccineinformation.org screenshot

About Website

Welcome to vaccineinformation.org homepage info - get ready to check Vaccine Information best content for United States right away, or after learning these important things about vaccineinformation.org

Find accurate and factual information about vaccines and the diseases they prevent presented in plain language for real people and families.

Visit vaccineinformation.org

Key Findings

We analyzed Vaccineinformation.org page load time and found that the first response time was 552 ms and then it took 2.2 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 40% of websites can load faster.

Performance Metrics

vaccineinformation.org performance score

51

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.9 s

51/100

10%

LCP (Largest Contentful Paint)

Value4.9 s

28/100

25%

SI (Speed Index)

Value5.2 s

59/100

10%

TBT (Total Blocking Time)

Value600 ms

49/100

30%

CLS (Cumulative Layout Shift)

Value0.037

100/100

15%

TTI (Time to Interactive)

Value9.4 s

30/100

10%

Network Requests Diagram

vaccineinformation.org

552 ms

demo.css

119 ms

dw_cookies.js

139 ms

dw_scroll_c.js

262 ms

vi_rotate.js

194 ms

Our browser made a total of 100 requests to load all elements on the main page. We found that 80% of them (80 requests) were addressed to the original Vaccineinformation.org, 8% (8 requests) were made to Google.com and 3% (3 requests) were made to Cse.google.com. The less responsive or slowest element that took the longest time to load (552 ms) belongs to the original domain Vaccineinformation.org.

Page Optimization Overview & Recommendations

Page size can be reduced by 261.2 kB (60%)

Content Size

434.3 kB

After Optimization

173.0 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Vaccineinformation.org main page is 434.3 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 50% of websites need less resources to load. HTML takes 145.9 kB which makes up the majority of the site volume.

HTML Optimization

-90%

Potential reduce by 131.0 kB

  • Original 145.9 kB
  • After minification 92.2 kB
  • After compression 14.8 kB

HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. This page needs HTML code to be minified as it can gain 53.6 kB, which is 37% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 131.0 kB or 90% of the original size.

Image Optimization

-3%

Potential reduce by 2.4 kB

  • Original 74.9 kB
  • After minification 72.5 kB

Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. Vaccine Information images are well optimized though.

JavaScript Optimization

-31%

Potential reduce by 34.7 kB

  • Original 111.6 kB
  • After minification 107.8 kB
  • After compression 77.0 kB

It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 34.7 kB or 31% of the original size.

CSS Optimization

-91%

Potential reduce by 93.2 kB

  • Original 101.9 kB
  • After minification 84.5 kB
  • After compression 8.7 kB

CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered. Vaccineinformation.org needs all CSS files to be minified and compressed as it can save up to 93.2 kB or 91% of the original size.

Requests Breakdown

Number of requests can be reduced by 57 (59%)

Requests Now

97

After Optimization

40

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 97 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Vaccine Information. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 11 to 1 for JavaScripts and from 7 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

vaccineinformation.org

vaccineinformation.org

552 ms

demo.css

demo.css

119 ms

dw_cookies.js

dw_cookies.js

139 ms

dw_scroll_c.js

dw_scroll_c.js

262 ms

vi_rotate.js

vi_rotate.js

194 ms

dd3.js

dd3.js

220 ms

dd3.css

dd3.css

217 ms

hh.css

hh.css

195 ms

scroll_h.css

scroll_h.css

66 ms

vi_global.css

vi_global.css

117 ms

cse.js

cse.js

126 ms

sml0183.jpg

sml0183.jpg

280 ms

sml0184.jpg

sml0184.jpg

277 ms

sml0185.jpg

sml0185.jpg

277 ms

sml0186.jpg

sml0186.jpg

275 ms

sml0187.jpg

sml0187.jpg

274 ms

sml0188.jpg

sml0188.jpg

331 ms

sml0189.jpg

sml0189.jpg

330 ms

sml0190.jpg

sml0190.jpg

330 ms

sml0000.jpg

sml0000.jpg

329 ms

facebook-logo.jpg

facebook-logo.jpg

329 ms

healthpro-666666.gif

healthpro-666666.gif

122 ms

public-4A4A4A.gif

public-4A4A4A.gif

123 ms

izcoalitions-333333.gif

izcoalitions-333333.gif

140 ms

space1.gif

space1.gif

123 ms

underline-blank.gif

underline-blank.gif

114 ms

general-arrow-off.gif

general-arrow-off.gif

124 ms

infant-arrow-off.gif

infant-arrow-off.gif

151 ms

preteen-arrow-off.gif

preteen-arrow-off.gif

259 ms

teen-arrow-off.gif

teen-arrow-off.gif

268 ms

adult-arrow-off.gif

adult-arrow-off.gif

266 ms

infants-children-box-off.gif

infants-children-box-off.gif

266 ms

preteens-box-off.gif

preteens-box-off.gif

267 ms

teens-box-off.gif

teens-box-off.gif

266 ms

adults-box-off.gif

adults-box-off.gif

263 ms

hom0191.jpg

hom0191.jpg

320 ms

sml0183.jpg

sml0183.jpg

317 ms

sml0184.jpg

sml0184.jpg

317 ms

sml0185.jpg

sml0185.jpg

316 ms

sml0186.jpg

sml0186.jpg

320 ms

sml0187.jpg

sml0187.jpg

318 ms

sml0188.jpg

sml0188.jpg

367 ms

sml0189.jpg

sml0189.jpg

376 ms

sml0190.jpg

sml0190.jpg

371 ms

sml0000.jpg

sml0000.jpg

374 ms

ptbox-orange-on.gif

ptbox-orange-on.gif

365 ms

ptbox-green-off.gif

ptbox-green-off.gif

437 ms

ptbox-blue-off.gif

ptbox-blue-off.gif

436 ms

ptbox-pink-off.gif

ptbox-pink-off.gif

437 ms

facebook_header.gif

facebook_header.gif

471 ms

thrive.jpg

thrive.jpg

469 ms

GLT.jpg

GLT.jpg

470 ms

GRT.jpg

GRT.jpg

473 ms

vaccines-gov.gif

vaccines-gov.gif

479 ms

GLB.jpg

GLB.jpg

472 ms

GRB.jpg

GRB.jpg

522 ms

all.js

all.js

123 ms

pt-infant.htm

pt-infant.htm

470 ms

cse.js

cse.js

215 ms

general-corner-left.gif

general-corner-left.gif

211 ms

general-corner-right.gif

general-corner-right.gif

265 ms

infant-corner-left.gif

infant-corner-left.gif

259 ms

infant-corner-right.gif

infant-corner-right.gif

279 ms

preteen-corner-left.gif

preteen-corner-left.gif

261 ms

preteen-corner-right.gif

preteen-corner-right.gif

265 ms

teen-corner-left.gif

teen-corner-left.gif

267 ms

teen-corner-right.gif

teen-corner-right.gif

333 ms

adult-corner-left.gif

adult-corner-left.gif

333 ms

adult-corner-right.gif

adult-corner-right.gif

335 ms

top-curve-corner-grey.jpg

top-curve-corner-grey.jpg

424 ms

dottedline-AAAAAA-bkgd-f5f5e9.gif

dottedline-AAAAAA-bkgd-f5f5e9.gif

422 ms

dottedline.jpg

dottedline.jpg

421 ms

facebook_bkgd.gif

facebook_bkgd.gif

434 ms

column-arrowgeneral-thin.gif

column-arrowgeneral-thin.gif

490 ms

GlineT.jpg

GlineT.jpg

486 ms

home-bg-wings.gif

home-bg-wings.gif

226 ms

GlineL.jpg

GlineL.jpg

365 ms

GlineR.jpg

GlineR.jpg

363 ms

GlineB.jpg

GlineB.jpg

408 ms

ga.js

ga.js

58 ms

__utm.gif

__utm.gif

40 ms

193 ms

jsapi

jsapi

130 ms

xd_arbiter.php

xd_arbiter.php

120 ms

xd_arbiter.php

xd_arbiter.php

219 ms

default+en.css

default+en.css

16 ms

default.css

default.css

35 ms

default+en.I.js

default+en.I.js

49 ms

default.css

default.css

70 ms

like.php

like.php

143 ms

roald-dahl.jpg

roald-dahl.jpg

134 ms

dottedline-666-F7.gif

dottedline-666-F7.gif

134 ms

async-ads.js

async-ads.js

69 ms

google_custom_search_watermark.gif

google_custom_search_watermark.gif

44 ms

small-logo.png

small-logo.png

70 ms

clear.gif

clear.gif

71 ms

fy8tT2klpgR.js

fy8tT2klpgR.js

167 ms

LVx-xkvaJ0b.png

LVx-xkvaJ0b.png

181 ms

L-arrow-off.gif

L-arrow-off.gif

56 ms

R-arrow-off.gif

R-arrow-off.gif

66 ms

Accessibility Review

vaccineinformation.org accessibility score

55

Accessibility Issues

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

Background and foreground colors do not have a sufficient contrast ratio.

Names and labels

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

<frame> or <iframe> elements do not have a title

High

Image elements do not have [alt] attributes

High

Form elements do not have associated labels

High

Links do not have a discernible name

Best Practices

vaccineinformation.org best practices score

67

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

High

Issues were logged in the Issues panel in Chrome Devtools

SEO Factors

vaccineinformation.org SEO score

62

Search Engine Optimization Advices

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Impact

Issue

High

Links do not have descriptive text

High

Image elements do not have [alt] attributes

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    EN

  • Encoding

    WINDOWS-1252

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Vaccineinformation.org can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that Vaccineinformation.org main page’s claimed encoding is windows-1252. Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.

Social Sharing Optimization

vaccineinformation.org

Open Graph description is not detected on the main page of Vaccine Information. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks: