Sexually Transmitted Infections (STIs)

STI header

What is an STI? 

Sexually transmissible infections (STIs) are infections which can be passed from one person to another during sexual contact. There are many different types of STIs. Not all of them have obvious symptoms, so it is easy to have an STI without knowing. Most STIs can be cured and all are treatable. But if left untreated, STIs can have long term effects on your health.  

How are STIs transmitted? 

The most common ways that STIs can be transmitted (passed from one person to another) are through: 

STI symptoms 

Many STIs often have no symptoms which is why it is important to get tested regularly.  When STIs do cause symptoms, they usually develop in the genital area. The genital area includes the: 

STI Symptoms can include: 

Protecting yourself from STIs 

The best way to protect yourself from most STIs is by: 

More information  

Common STIs 


Chlamydia illustration

Chlamydia is the most common STI in the world.

Most people have no symptoms. 

Using condoms or dental dams can decrease your chances of getting chlamydia.



The Herpes Simplex Virus causes a viral skin condition known as cold sores (HSV1 on the face) and herpes (HSV2 on the genitals).

You can, however, get the HSV1 on your genitals.


HPV icon

HPV (Human Papilloma Virus) is one of the most common viruses, with over 100 different types.

HPV is the leading cause of cervical cancer⁣⁣.






Gonorrhea icon

Gonorrhea is a common STI that can affect anyone who has unprotected sex (without condoms) with someone who has the infection. 

Gonorrhea infections are rapidly increasing in people aged 15-24.


Syphilis icon

Syphilis is curable but if left untreated, can lead to serious health issues.

It can also be transmitted to babies during pregnancy and at birth.