=== HTTP code : 301 ===

Response headers
================
HTTP/1.1 301 Moved Permanently
Server: nginx
Date: Fri, 02 Aug 2019 07:40:14 GMT
Content-Type: text/html; charset=iso-8859-1
Content-Length: 224
X-Content-Type-Options: nosniff
Location: https://nih.gov/
Cache-Control: max-age=1209600
Expires: Fri, 16 Aug 2019 07:40:14 GMT
X-Request-ID: v-c44047de-b4f8-11e9-90eb-22000a71bb59
Age: 416561
Via: varnish
X-Cache: HIT
X-Cache-Hits: 1176186
Connection: close

Request headers
================
HEAD / HTTP/1.1
Host: nih.gov
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.102 Safari/537.36
Accept: */*
Referer: https://bme.fiu.edu
Connection: close


Link is valid.