If you're not immune to chickenpox, you can easily catch it through close contact with someone who has it, such as face-to-face contact, for example, having a conversation with someone who has chickenpox, or being in the same room as someone who has chickenpox for at least 15 minutes. The virus can spread through the air, in tiny droplets of saliva and mucus from an infected person.
Chickenpox can also be passed on by touching the fluid from an infected person's blisters.
If you have chickenpox, you should avoid contact with pregnant women and newborn babies, until you're no longer infectious. Rarely, chickenpox can cause complications during pregnancy and for newborn babies.
Someone with chickenpox is infectious from about two days before the rash develops, until roughly five days after. You remain infectious until all your blisters have fully crusted over. This is usually 5-7 days after the first blister appears.
What is an overactive thyroid?
Overactive thyroid, also known as hyperthyroidism or thyrotoxicosis, is a condition that occurs when there is too much thyroid hormone in the body. The condition is more common in women than men and can cause symptoms such as hyperactivity, an increased appetite and sudden weight loss or gain.
Overactive thyroid can be effectively treated using medicines to slow the production of hormones from the thyroid gland, as well as radiotherapy and in some cases surgery.
If it is not successfully controlled, overactive thyroid can cause other health problems such as irregular heart rhythms and osteoporosis (weak, brittle bones).
What is vitiligo?
Vitiligo is a condition that causes pale, white patches to develop on the skin. The areas affected have little or no melanin.
It can affect any area of your skin, but most commonly occurs on areas exposed to the sun, such as face, neck and hands. It is more noticeable in people whose skin is dark or tanned. Some people only get a few small, white patches that progress no further. Other people get bigger white patches that join up across large areas of their skin.
There is no way of predicting how much of your skin will be affected. The white patches are usually permanent.
In the UK, about 1 in 100 people develop vitiligo - it is not clear what causes it, but it is not infectious.
There are treatment options to improve the appearance of your skin. In general, combination treatments, such as phototherapy (treatment with light) and medication, give the best results.
Skin camouflage cream is widely used to cover up the white patches.