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_gac_
Contains information related to marketing campaigns of the user. These are shared with Google AdWords / Google Ads when the Google Ads and Google Analytics accounts are linked together.
90 days
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ID used to identify users and sessions
2 years after last activity
__utmt
Used to monitor number of Google Analytics server requests
10 minutes
__utmb
Used to distinguish new sessions and visits. This cookie is set when the GA.js javascript library is loaded and there is no existing __utmb cookie. The cookie is updated every time data is sent to the Google Analytics server.
30 minutes after last activity
__utmc
Used only with old Urchin versions of Google Analytics and not with GA.js. Was used to distinguish between new sessions and visits at the end of a session.
End of session (browser)
__utmz
Contains information about the traffic source or campaign that directed user to the website. The cookie is set when the GA.js javascript is loaded and updated when data is sent to the Google Anaytics server
6 months after last activity
__utmv
Contains custom information set by the web developer via the _setCustomVar method in Google Analytics. This cookie is updated every time new data is sent to the Google Analytics server.
2 years after last activity
__utmx
Used to determine whether a user is included in an A / B or Multivariate test.
18 months
_ga
ID used to identify users
2 years
_gali
Used by Google Analytics to determine which links on a page are being clicked
30 seconds
_ga_
ID used to identify users
2 years
_gid
ID used to identify users for 24 hours after last activity
24 hours
_gat
Used to monitor number of Google Analytics server requests when using Google Tag Manager
1 minute
If I recall correctly, the rate of serious adverse reactions to the mRNA COVID vaccines was something like 1 in 800, which would be 125 per 100,000. I don’t know how many of these were life-threatening, but I seriously doubt it was nonzero.
In my case it was a bout of stage-3 hypertension the day after my second dose in mid-2021. None of the ER doctors knew anything about it, so I went through the full cardiac work-up before being released the next day. The hypertension and tachycardia symptoms gradually diminished but took a couple of years to go away completely.
No medical professional has ever acknowledged the possibility that my symptoms were vaccine-related, but I eventually came across an Italian observational study by Angeli _et al_ that fit my case: https://pubmed.ncbi.nlm.nih.gov/34985455/ . Naturally, the study was pointed out to me by a helpful commenter on one of the YouTube channels Tracinski disparages.
I was never vaccine-hesitant before that misadventure, but I have become a little more cautious since, at least toward anything brand-new or related to COVID or mRNA.
To my knowledge I’ve never had an actual COVID infection. So maybe the vaccine worked.