How microparticles are fabricated

1 Heating and pressing polymer between a patterned base mould and a Teflon surface

Polymer

Base mould

Teflon

2 Transferring the bases to a new surface and filling them with a drug or vaccine

Polymer

bases

Chosen drug

3 Placing polymer caps on top of the drug- filled cases and sealing by heating them briefly

Caps heat-sealed

onto bases

Cap

mould

By varying the chemical makeup of the polymer, drugs can be released at different points in time

7-day

14-day

21-day

28-day

And delivered in a single injection

1 Heating and pressing polymer between a patterned base mould and a Teflon surface

2 Transferring the bases to a new surface and filling them with a drug or vaccine

Polymer

Base mould

Teflon

Polymer

bases

Chosen drug

By varying the chemical makeup of the polymer, drugs can be released at different points in time

3 Placing polymer caps on top of the drug- filled cases and sealing by heating them briefly

Caps heat-sealed

onto bases

Cap

mould

7-day

14-day

21-day

28-day

And delivered in a single injection