Tools & Wizards About Us
vaccinesafetynet.org screenshot

Report Summary

  • 12

    Performance

    Renders faster than
    25% of other websites

  • 84

    Accessibility

    Visual factors better than
    that of 57% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    36% of websites

  • 82

    SEO

    Google-friendlier than
    44% of websites

vaccinesafetynet.org

home

Page Load Speed

2.9 sec in total

First Response

455 ms

Resources Loaded

2.3 sec

Page Rendered

176 ms

vaccinesafetynet.org screenshot

About Website

Click here to check amazing Vaccinesafetynet content. Otherwise, check out these important facts you probably never knew about vaccinesafetynet.org

VSN is a global network of websites, established by the World Health Organization, that provides reliable information on vaccine safety.

Visit vaccinesafetynet.org

Key Findings

We analyzed Vaccinesafetynet.org page load time and found that the first response time was 455 ms and then it took 2.4 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 45% of websites can load faster.

Performance Metrics

vaccinesafetynet.org performance score

12

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.5 s

35/100

10%

LCP (Largest Contentful Paint)

Value22.8 s

0/100

25%

SI (Speed Index)

Value10.8 s

6/100

10%

TBT (Total Blocking Time)

Value2,230 ms

6/100

30%

CLS (Cumulative Layout Shift)

Value0.304

39/100

15%

TTI (Time to Interactive)

Value25.2 s

0/100

10%

Network Requests Diagram

vaccinesafetynet.org

455 ms

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100 ms

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202 ms

css_ga08Xt-5JbiO25FTE8jS80Pkb48nkugAsdNI074WQbk.css

198 ms

css_OrFuGMVkzx7IIwvil5wcB79ovKN-Zgnz7iPZFvFjqKI.css

295 ms

Our browser made a total of 72 requests to load all elements on the main page. We found that 46% of them (33 requests) were addressed to the original Vaccinesafetynet.org, 11% (8 requests) were made to Google.com and 7% (5 requests) were made to Youtube.com. The less responsive or slowest element that took the longest time to load (1 sec) belongs to the original domain Vaccinesafetynet.org.

Page Optimization Overview & Recommendations

Page size can be reduced by 256.1 kB (30%)

Content Size

861.2 kB

After Optimization

605.1 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Vaccinesafetynet.org main page is 861.2 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. 80% of websites need less resources to load and that’s why Accessify’s recommendations for optimization and resource minification can be helpful for this project. Images take 354.5 kB which makes up the majority of the site volume.

HTML Optimization

-78%

Potential reduce by 67.0 kB

  • Original 85.4 kB
  • After minification 80.1 kB
  • After compression 18.4 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. HTML code on this page is well minified. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 67.0 kB or 78% of the original size.

Image Optimization

-0%

Potential reduce by 159 B

  • Original 354.5 kB
  • After minification 354.3 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. Vaccinesafetynet images are well optimized though.

JavaScript Optimization

-0%

Potential reduce by 570 B

  • Original 128.3 kB
  • After minification 128.3 kB
  • After compression 127.7 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. This website has mostly compressed JavaScripts.

CSS Optimization

-64%

Potential reduce by 188.4 kB

  • Original 293.0 kB
  • After minification 290.7 kB
  • After compression 104.6 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. Vaccinesafetynet.org needs all CSS files to be minified and compressed as it can save up to 188.4 kB or 64% of the original size.

Requests Breakdown

Number of requests can be reduced by 34 (65%)

Requests Now

52

After Optimization

18

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 52 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Vaccinesafetynet. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 24 to 1 for JavaScripts and from 12 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

vaccinesafetynet.org

vaccinesafetynet.org

455 ms

css_lQaZfjVpwP_oGNqdtWCSpJT1EMqXdMiU84ekLLxQnc4.css+css_ZwQ4JegYk9_vB7LtvEKjfjeVcLzDAa88SNWeshZo5Jw.css+css_i3VagfpwsTL5OirKXucAN_d2000Zd1iYxlQaSmQH-g0.css.pagespeed.cc.b81UN45ZNN.css

css_lQaZfjVpwP_oGNqdtWCSpJT1EMqXdMiU84ekLLxQnc4.css+css_ZwQ4JegYk9_vB7LtvEKjfjeVcLzDAa88SNWeshZo5Jw.css+css_i3VagfpwsTL5OirKXucAN_d2000Zd1iYxlQaSmQH-g0.css.pagespeed.cc.b81UN45ZNN.css

100 ms

css_2vLNnT9VhuJHYxjR9QgdJvcw7NdkIXHVGch6bcBu_lY.css

css_2vLNnT9VhuJHYxjR9QgdJvcw7NdkIXHVGch6bcBu_lY.css

202 ms

css_ga08Xt-5JbiO25FTE8jS80Pkb48nkugAsdNI074WQbk.css

css_ga08Xt-5JbiO25FTE8jS80Pkb48nkugAsdNI074WQbk.css

198 ms

css_OrFuGMVkzx7IIwvil5wcB79ovKN-Zgnz7iPZFvFjqKI.css

css_OrFuGMVkzx7IIwvil5wcB79ovKN-Zgnz7iPZFvFjqKI.css

295 ms

bootstrap.min.css

bootstrap.min.css

20 ms

drupal-bootstrap.min.css

drupal-bootstrap.min.css

26 ms

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302 ms

jquery.min.js

jquery.min.js

15 ms

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219 ms

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199 ms

bootstrap.min.js

bootstrap.min.js

26 ms

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300 ms

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299 ms

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js_H_ggT4x-k5ETrQhLJ0IvXpCeBUfnCWAxOqwLW_cS1Yo.js

396 ms

cookieconsent.min.css

cookieconsent.min.css

23 ms

cookieconsent.min.js

cookieconsent.min.js

27 ms

widgets.js

widgets.js

101 ms

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337 ms

js_MRdvkC2u4oGsp5wVxBG1pGV5NrCPW3mssHxIn6G9tGE.js

js_MRdvkC2u4oGsp5wVxBG1pGV5NrCPW3mssHxIn6G9tGE.js

388 ms

analytics.js

analytics.js

47 ms

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310 ms

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Screenshot%202019-02-22%20at%2012.35.37.png

1039 ms

VSN%20Logo.svg

VSN%20Logo.svg

219 ms

WHO.svg

WHO.svg

216 ms

network-members100.gif

network-members100.gif

219 ms

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OpenSans-Regular-webfont.woff

393 ms

OpenSans-Light-webfont.woff

OpenSans-Light-webfont.woff

237 ms

OpenSans-Semibold-webfont.woff

OpenSans-Semibold-webfont.woff

393 ms

OpenSans-Bold-webfont.woff

OpenSans-Bold-webfont.woff

524 ms

OpenSans-ExtraBold-webfont.woff

OpenSans-ExtraBold-webfont.woff

524 ms

Roboto-Bold-webfont.woff

Roboto-Bold-webfont.woff

572 ms

Roboto-Black-webfont.woff

Roboto-Black-webfont.woff

571 ms

Roboto-Medium-webfont.woff

Roboto-Medium-webfont.woff

571 ms

Roboto-Regular-webfont.woff

Roboto-Regular-webfont.woff

571 ms

Roboto-Light-webfont.woff

Roboto-Light-webfont.woff

831 ms

Roboto-Thin-webfont.woff

Roboto-Thin-webfont.woff

634 ms

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fa-solid-900.woff

1005 ms

fa-regular-400.woff

fa-regular-400.woff

1003 ms

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cse.js

194 ms

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323 ms

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collect

97 ms

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115 ms

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80 ms

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94 ms

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93 ms

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ajax-loader.gif

ajax-loader.gif

818 ms

collect

collect

174 ms

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204 ms

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88 ms

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174 ms

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default.css

176 ms

settings

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230 ms

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async-ads.js

88 ms

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138 ms

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204 ms

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179 ms

www-embed-player.js

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237 ms

base.js

base.js

280 ms

clear.png

clear.png

175 ms

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nav_logo114.png

185 ms

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107 ms

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ad_status.js

342 ms

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163 ms

embed.js

embed.js

107 ms

VaccineSafetyN

VaccineSafetyN

209 ms

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171 ms

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155 ms

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155 ms

id

id

137 ms

Create

Create

217 ms

Accessibility Review

vaccinesafetynet.org accessibility score

84

Accessibility Issues

ARIA

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

[role]s are not contained by their required parent element

High

ARIA toggle fields do not have accessible names

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

Links do not have a discernible name

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<html> element does not have a [lang] attribute

Best Practices

vaccinesafetynet.org best practices score

75

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

SEO Factors

vaccinesafetynet.org SEO score

82

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

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

Links are not crawlable

Mobile Friendly

Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).

Impact

Issue

High

Document uses legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Vaccinesafetynet.org can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Vaccinesafetynet.org main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.

Social Sharing Optimization

vaccinesafetynet.org

Open Graph data is detected on the main page of Vaccinesafetynet. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: