cdc.gov
🖥 Status: up
🕒 Response Time: 0.032 sec
⬅️ Response Code: 200
Cdc.gov was inspected for operability 444 times in the 1 795 days following January 27, 2021. Availability checks show cdc.gov was accessible 443 times total, as indicated by the 200 status code obtained on December 27, 2025. As of December 27, 2025, all tests indicated that no inaccessibility periods occurred on cdc.gov. The latest error, with code 500 returned, was received on January 18, 2025, out of 1 responses containing errors. Cdc.gov responded in 0.032 seconds on December 27, 2025, while its average response time was 0.889 seconds.
444
Last Updated: December 27, 2025
| United States | 100.00% | ||||||||
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| Site | Total Checks | Last Modified |
|---|---|---|
| 87 | December 6, 2020 | |
| 31 | January 8, 2019 | |
| 444 | January 27, 2021 | |
| 46 | January 27, 2021 | |
| 13 | January 27, 2021 |
5ibc.net | Cdc.gov | ||||
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| Page Title | The website title plays a vital role in both SEO and user experience; it should be informative, descriptive of the page's main content, concise to stay within search engine character limits, typically under 60 characters, include a primary keyword near the beginning to signal relevance to search engine algorithms. |
|---|---|
| Centers for Disease Control and Prevention | CDC Length: 48 characters | |
| Meta Description | The meta description acts as the first point of contact for searchers; optimize it to be keyword-rich yet under 160 characters, clearly communicate the page's value proposition, and avoid repetition to maximize click-through rates from search engine listings. |
| no meta description data for cdc.gov 2025-12-27T18:35:57+00:00 | |
| Meta Keywords | Websites attempting to leverage meta keywords for improved rankings might find their efforts wasted, as contemporary search engines have moved beyond simplistic keyword-based ranking methods to assess quality. |
| no meta keywords data for cdc.gov 2025-12-27T18:35:57+00:00 | |
| Page Content | Thoroughly research and synthesize information within each piece of page content to provide unique value, ensuring accuracy, depth, and a user-centric approach that meets search intent comprehensively. |
| Web Page Content Length: 48735 characters | |
| H1 Heading | Differentiating your H1 tags effectively helps search engines recognize the specific focus of each webpage, improving content targeting, and allows users to quickly determine page relevance before deciding to engage further with any of your site's numerous offerings. |
| no h1 heading data for cdc.gov 2025-12-27T18:35:57+00:00 | |
| H2 Headings | In terms of accessibility best practices, H2 tags provide essential structural cues for screen reader users, allowing them to navigate complex web content more efficiently and understand the layout. |
| Featured Topics A to Z News All News Scientific Journals Science at CDC Count: 5 heading tag | |
| H3 Headings | Create a logical flow between H2 sections by ensuring H3 subsections provide specific examples or detailed explanations that build upon the broader topic established above. |
| no h3 headings data for cdc.gov 2025-12-27T18:35:57+00:00 | |
| H4 Headings | Unlike H1 and H2 headings which establish main topics and broad categories, H4 tags are reserved for more granular points, ensuring proper semantic hierarchy and preventing keyword stuffing penalties from overuse. |
| no h4 headings data for cdc.gov 2025-12-27T18:35:57+00:00 | |
| H5-H6 Headings | For complex, technical documentation, carefully utilize H5 and H6 tags to categorize detailed procedures, warnings, notes, or references within the main content flow. |
| no h5-h6 headings data for cdc.gov 2025-12-27T18:35:57+00:00 | |
| Image ALT Attributes | Remember that search engine algorithms rely on alternative text as a key factor in understanding the content represented by images; provide this vital descriptive information accurately and effectively on all relevant website pages. |
| no image alt attributes data for cdc.gov 2025-12-27T18:35:57+00:00 | |
| Robots.txt | Incorporate the location of your XML sitemap directly into the robots.txt file using a 'Sitemap:' directive to streamline discovery for Googlebot and other compliant search engines. |
| file robots.txt was found on the website | |
| XML Sitemap | XML sitemaps can effectively help manage and prevent the indexing of duplicate or thin content across different URLs on your website, thereby improving the overall quality and relevance profile of your indexed pages. |
| https://www.cdc.gov/wcms-auto-sitemap-index.xml available for crawling | |
| Page Size | Compressing images using modern formats like WebP and employing browser caching techniques are effective strategies to significantly lower page load times for better user satisfaction. |
| page size: 48 kb | |
| Response Time | Implement robust performance monitoring to track your website's response time trends and proactively address any slowdowns, as this directly influences search engine rankings and user engagement metrics across the board. |
| response time: 0.889 sec | |
| Minify CSS | Boost your website's Core Web Vitals performance, particularly LCP, by ensuring your CSS is properly minified to remove all whitespace and explanatory comments, leading to faster resource loading, quicker page rendering for users, improved user experience metrics, and consequently better rankings in search results. |
| Minified: /TemplatePackage/5.0/css/homepage/hp-2024.min.css?_=87006 /TemplatePackage/5.0/css/print.min.css?_=87006 Unminified: /homepage/hp2024.css included in the page | |
| Minify JavaScript | Minify JavaScript files to reduce their size by removing all whitespace, comments, and redundant code characters, which accelerates page load speed, enhances the website's overall performance, and is a positive ranking signal for search engines. |
| Minified: /config/cdc_config.js /TemplatePackage/contrib/libs/bootstrap/5x/bootstrap.bundle.min.js?_=87006 /TemplatePackage/5.0/js/libs/wow.min.js?_=87006 /TemplatePackage/5.0/js/homepage/cdc-hp-2024.min.js?_=87006 /TemplatePackage/5.0/js/app.min.js?_=87006 Unminified: https://www.cdc.gov/JScript/dmat/cdc-dmat.min.js?account=cdcgov&_=90576 /TemplatePackage/5.0/js/modules/banner.js /TemplatePackage/contrib/libs/jquery/latest/jquery.js?_=87006 /homepage/hp2024.js detected during site scan | |
| Structured Data | Testing and monitoring your Schema Markup implementation using tools like Google Search Console's Rich Results Test ensures that your structured data is correctly formatted and functioning effectively for improved SEO outcomes. |
| no structured data data for cdc.gov 2025-12-27T18:35:57+00:00 | |
| CDN Usage | Enhance your website's security posture by implementing strict HTTPS enforcement across your Content Delivery Network, configuring HTTP security headers (like CSP, X-Content-Type-Options, X-XSS-Protection), potentially utilizing DNSSec for authoritative name resolution, and ensuring all assets served via CDN are securely delivered over encrypted connections. |
| no cdn usage data for cdc.gov 2025-12-27T18:35:57+00:00 | |
| SSL certificates | Utilizing Extended Validation (EV) SSL certificates offers a higher level of security validation, visibly displayed in browsers, which can further boost user trust and perceived brand authority, potentially enhancing SEO ranking signals. |
| SSL is enabled on the website |