Fungi are the biggest and viruses are the smallest.
Germs love to grow in dirty places and spreads very fast after a big flood, tsunami, earthquake and wars.
After natural disasters there will be cholera outbreak and other diseases from bacteria infections.
To fight germs we have to keep ourselves and our environment clean.
Always wash our hands using anti-bacteria soap and clean water, eat healthy food and drink a lot of water, juices, tea, herb tea and other healthy drinks.