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- nationalcancerinstituteHappy #4thofJuly! Science can resemble fireworks, as this image of a human natural killer cell illustrates. Natural killer cells help fight infection and disease. To celebrate the #Fourth, NIH Director Dr. Francis Collins tweeted this colorized #scanning #electron #micrograph from the NIH Image Gallery on flickr: https://www.flickr.com/photos/nihgov/29209231252 #NCI #NIH #science #research
- selfs6🐨🔭🌌