I don't think the flu exists. You might be sick, but it probably isn't because of a unicorn "virus" that they've never isolated
But yes, get more vitamin D from sunlight
Discussion
Check out the findings of Stefan Lanka, PhD. Actually he found viruses do *not* exist. He proved it scientifically.
nostr:nevent1qqsp0k8nsgqfsw68lwr4k9t469dh2feq90nwehmf3mtagxtpuhcvm9qcs30em
Interesting