> For the complete documentation index, see [llms.txt](https://tweetfi.gitbook.io/english/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://tweetfi.gitbook.io/english/nft-introduction/nft-infection.md).

# NFT Infection

<figure><img src="/files/lKUXE7afRRR29P7iRLR7" alt=""><figcaption></figcaption></figure>

When you tweet, there is a certain probability that the NFT will become infected with the virus.

If the NFT becomes infected, you will not get TWF when you tweet. The infection will automatically go away after 7 days. Or you can use Drug to cure it instantly. You can purchase Drug at the market. The probability of infection depends on the number of tweets by the NFT.

Probability of infection

| Number of tweet | Probability of infection |
| --------------- | ------------------------ |
| 1-99            | 1%                       |
| 100-299         | 3%                       |
| 300-599         | 5%                       |
| 600-999         | 10%                      |
| 1000-1499       | 20%                      |
| 1500-           | 40%                      |

Virus infection does not occur in the following cases.

* The first 10 tweets hatched from the Egg
* 10 tweets after curing from Virus Infection
* After 20 virus infections, the NFT is automatically Burned.


---

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