Tools & Wizards About Us
covid-19vaccinetracker.org screenshot

Report Summary

  • 40

    Performance

    Renders faster than
    59% of other websites

  • 90

    Accessibility

    Visual factors better than
    that of 74% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 89

    SEO

    Google-friendlier than
    66% of websites

covid-19vaccinetracker.org

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Page Load Speed

4.6 sec in total

First Response

147 ms

Resources Loaded

2.3 sec

Page Rendered

2.1 sec

covid-19vaccinetracker.org screenshot

About Website

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Visit covid-19vaccinetracker.org

Key Findings

We analyzed Covid-19vaccinetracker.org page load time and found that the first response time was 147 ms and then it took 4.4 sec to load all DOM resources and completely render a web page. This is a poor result, as 70% of websites can load faster.

Performance Metrics

covid-19vaccinetracker.org performance score

40

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.7 s

61/100

10%

LCP (Largest Contentful Paint)

Value4.2 s

43/100

25%

SI (Speed Index)

Value5.5 s

54/100

10%

TBT (Total Blocking Time)

Value3,710 ms

1/100

30%

CLS (Cumulative Layout Shift)

Value0.002

100/100

15%

TTI (Time to Interactive)

Value10.7 s

22/100

10%

Network Requests Diagram

covid-19vaccinetracker.org

147 ms

www.covid-19vaccinetracker.org

571 ms

1p-covid-19-vaccine-track-beta.dd4ac4778.min.css

148 ms

imd7ktz.js

143 ms

js

60 ms

Our browser made a total of 64 requests to load all elements on the main page. We found that 89% of them (57 requests) were addressed to the original Covid-19vaccinetracker.org, 8% (5 requests) were made to Use.typekit.net and 2% (1 request) were made to Googletagmanager.com. The less responsive or slowest element that took the longest time to load (1.5 sec) belongs to the original domain Covid-19vaccinetracker.org.

Page Optimization Overview & Recommendations

Page size can be reduced by 878.3 kB (69%)

Content Size

1.3 MB

After Optimization

394.8 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Covid-19vaccinetracker.org main page is 1.3 MB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 60% of websites need less resources to load. HTML takes 840.1 kB which makes up the majority of the site volume.

HTML Optimization

-93%

Potential reduce by 779.4 kB

  • Original 840.1 kB
  • After minification 840.0 kB
  • After compression 60.7 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 779.4 kB or 93% of the original size.

Image Optimization

-17%

Potential reduce by 31.6 kB

  • Original 184.8 kB
  • After minification 153.2 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. Obviously, Covid 19 Vaccinetracker needs image optimization as it can save up to 31.6 kB or 17% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-25%

Potential reduce by 51.0 kB

  • Original 200.6 kB
  • After minification 200.6 kB
  • After compression 149.6 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 51.0 kB or 25% of the original size.

CSS Optimization

-34%

Potential reduce by 16.4 kB

  • Original 47.6 kB
  • After minification 47.6 kB
  • After compression 31.3 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. Covid-19vaccinetracker.org needs all CSS files to be minified and compressed as it can save up to 16.4 kB or 34% of the original size.

Requests Breakdown

Number of requests can be reduced by 24 (43%)

Requests Now

56

After Optimization

32

  • Images
  • JavaScript
  • CSS

The browser has sent 56 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Covid 19 Vaccinetracker. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 7 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

covid-19vaccinetracker.org

covid-19vaccinetracker.org

147 ms

www.covid-19vaccinetracker.org

www.covid-19vaccinetracker.org

571 ms

1p-covid-19-vaccine-track-beta.dd4ac4778.min.css

1p-covid-19-vaccine-track-beta.dd4ac4778.min.css

148 ms

imd7ktz.js

imd7ktz.js

143 ms

js

js

60 ms

sharethis.js

sharethis.js

232 ms

fbevents.js

fbevents.js

252 ms

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5f3d904875133e424e80d3d0_syringe_push.svg

642 ms

5f3d904875133ebc0080d3d4_Vaccine%20Petri%20Dish%20_empty.svg

5f3d904875133ebc0080d3d4_Vaccine%20Petri%20Dish%20_empty.svg

658 ms

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5f3d904875133e212380d436_Vaccine%20Petri%20Dish%201.svg

646 ms

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5f3d904875133eaf8c80d438_Vaccine%20Petri%20Dish%202.svg

652 ms

5f3d904875133e71ef80d437_Vaccine%20Petri%20Dish%203.svg

5f3d904875133e71ef80d437_Vaccine%20Petri%20Dish%203.svg

738 ms

5f3d904875133e568380d440_Artboard%208%20copy.png

5f3d904875133e568380d440_Artboard%208%20copy.png

746 ms

5f3d904875133e825380d41e_VacTrac_ClinicalTrial_02_Phase_I_comp1.png

5f3d904875133e825380d41e_VacTrac_ClinicalTrial_02_Phase_I_comp1.png

746 ms

5f3d904875133ee4a180d424_VacTrac_ClinicalTrial_03_Phase_II-1_comp1.png

5f3d904875133ee4a180d424_VacTrac_ClinicalTrial_03_Phase_II-1_comp1.png

748 ms

5f3d904875133e753880d421_VacTrac_ClinicalTrial_04_Stage_III_comp1.png

5f3d904875133e753880d421_VacTrac_ClinicalTrial_04_Stage_III_comp1.png

748 ms

5f3d904875133ee71080d41f_VacTrac_ClinicalTrial_05_RR_comp1.png

5f3d904875133ee71080d41f_VacTrac_ClinicalTrial_05_RR_comp1.png

746 ms

5f3d904875133ed58d80d3de_VacTrac_ClinicalTrial_06_Phase_IV.png

5f3d904875133ed58d80d3de_VacTrac_ClinicalTrial_06_Phase_IV.png

905 ms

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5f3d904875133e96d180d3e3_Syringe%20Small.svg

866 ms

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5f3d904875133e5d2880d43a_Globe2_Outer2.svg

856 ms

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861 ms

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856 ms

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5f3d904875133e797480d413_Inactivated.svg

868 ms

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900 ms

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928 ms

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901 ms

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5f3d904875133e5e2180d412_RNA%20Based.svg

898 ms

jquery-3.5.1.min.dc5e7f18c8-site-5f3d904875133e394e80d343.js

jquery-3.5.1.min.dc5e7f18c8-site-5f3d904875133e394e80d343.js

795 ms

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53 ms

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206 ms

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260 ms

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446 ms

1p-covid-19-vaccine-track-beta.aeca64aba.js

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837 ms

email-decode.min.js

email-decode.min.js

669 ms

5f3d904875133e4c7e80d442_Replic%20Viral_2.svg

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1492 ms

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5f3d904875133ef2a580d441_Non-Replic%20Viral.svg

1494 ms

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5f3d904875133ef38080d416_Virus-Like%20Particle.svg

1494 ms

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1494 ms

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1496 ms

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1292 ms

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1094 ms

Accessibility Review

covid-19vaccinetracker.org accessibility score

90

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.

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

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

Links do not have a discernible name

Best Practices

covid-19vaccinetracker.org best practices score

83

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

SEO Factors

covid-19vaccinetracker.org SEO score

89

Search Engine Optimization Advices

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 doesn't use 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 Covid-19vaccinetracker.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 Covid-19vaccinetracker.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

covid-19vaccinetracker.org

Open Graph data is detected on the main page of Covid 19 Vaccinetracker. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: